Aisin Aw Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Kimiyoshi Sawai

Tomoki Kodan

Hironobu Sugimoto

Seiji Takahata

Motohiro Nakamura

Norihiro Nakamura

Kazunori Watanabe

Takayuki Watanabe

Toshio Nomura

Yasutaka Atarashi

A map data storage device, a map data updating method, and a computer program that can shorten the time required for a map data updating process. In the case where map data stored in a navigation-side local DB of a navigation apparatus are to be updated, the navigation apparatus updates the map data stored in the navigation-side local DB on the basis of map updating data received from a map distribution center, and prepares a data reference index that associates a PID (universal identification information) included in the map data with a record number (internal identification information) included in the map data on the basis of the updated map data. After that, in the case where an application is executed by the navigation apparatus, the prepared data reference index is referenced to access the map data stored in the navigation-side local DB.

Map data storage device, map data updating method, and computer program

A map update data supply device includes: a request update data extraction unit that based on an update request extracts a request update section, and a latest version of an overwrite update data file for overwrite updating; and a safeguard update data extraction unit that extracts a safeguard update section that safeguards a network between adjacent sections, and up to an update safeguard version of a difference update data file, wherein the extracted data files are supplied to a navigation device.

Map update data supply device and map update data supply program

A data updating system includes a navigation device running according to a predefined application program; and a server providing the navigation device with a differential data file for updating a database containing road network data. The navigation device includes a navigation memory storing a local database in an updating data format in which the road network data is arranged in the order of data types and to be updated with the differential data file; and a navigation controller that converts data stored in the local database so as to have the reference data format in which the road network data is arranged in the order of connection of the road network to be referenced to by the application program. The server includes a server controller that outputs the differential data file to be provided to the navigation device.

Data updating system, navigation device, server, and method of data updating

A map update data supply device and method includes an update map database of per section versions of an update data file, and a request update data extraction unit for extracting a request update section and an update data file. A safeguard update data extraction unit extracts a safeguard update section to safeguard a road network connection between adjacent sections. An integrated data generation unit integrates all versions of the update data file for each extracted request update section and generates a request update integrated data file. The integrated data generation unit integrates, per safeguard update section, versions of the update data file up to the update safeguard version for each extracted safeguard update section, and generates a safeguard update integrated data file. An integrated data supply unit supplies the generated request update integrated data file and the safeguard update integrated data file to a navigation device.

Map update data supply device and method

Data in an update data format for performing an update of reference map data is formed by storing in each data frame divided for each data type, at least one of: a first group of one or more common map data records to be stored according to the data type of each data frame in a common map data frame after a conversion by a conversion unit; a second group of one or more first map data records to be stored according to the data type of each data frame in a first map data frame after a conversion by a conversion unit; and a third group of one or more second map data records to be stored according to the data type of each data frame in a second map data frame after a conversion by a conversion unit.

Navigation device and data update system

A road map data structure includes road network data Rn, representing roads by a connection relation of a plurality of links L, in a hierarchical structure of a plurality of levels, in which, as a link ID for each link L at a lowest level, consecutive serial IDs, according to a connection order of the links within a link line ML formed of a plurality of the consecutive links having a common attribute, are assigned to first links Lwhich have a corresponding link existing at a higher level, and a permanent ID, irrelevant with the connection order of the links, is assigned to a second link Lwhich does not have a corresponding link existing at a higher level.

Road map data structure, road map data storage medium, navigation device, and method of generating road map data

A map update data supply apparatus includes: isolation detection means for detecting the presence and the absence of an isolated state in which some of the roads are isolated from other roads in a road network of target map data due to updating of one or more update target segments of the target map data based on update map data; extraction means for extracting, as update required segments, segments of the update map data, other than the update target segments, that have a road that connects to the isolated some of the roads when it is detected that there is the isolated state; and update data file generating means for generating update data files for the update target segments and the update required segments based on the update map data.

Map update data supply apparatus, map data update system, and map update data supply method

Map updating systems, methods, and programs that store map information, including one or more pieces of difference update information, obtain the one or more pieces of difference update information used for updating a part of the map information, and update the map information based on the one or more pieces of difference update information. The systems, methods, and programs obtain total update information used for updating an entirety of the memory to a new piece of map information, update the map information based on the total update information, compare a version of the total update information used in the total update with each of versions of the one or more pieces of difference update information stored in the memory, extract any of the one or more pieces of difference update information judged to be newer and update the map information based on the difference update information.

Map updating systems, methods and programs

Map updating systems, methods, and programs that store map information, including one or more pieces of difference update information, obtain the one or more pieces of difference update information used for updating a part of the map information to a new piece of map information, update the map information based on the one or more pieces of difference update information, and obtain total update information used for updating an entirety of the map information to a new piece of map information. The systems, methods, and programs perform a total update on the map information based on the total update information, update the map information on which the total update has been performed based on the one or more pieces of difference update information, and delete the one or more pieces of difference update information from the memory after the map information is updated by the re-updating means.

Map updating systems, methods, and programs

Map updating systems, methods, and programs that extract update requiring sections with respect to an update requesting section that is one of the sections being a target of an update request requesting that the target map data should be updated, obtain the information related to the guaranty versions respectively corresponding to the extracted update requiring sections by referring to the version table, the update requiring sections each being one of the sections that needs to be updated in order to guarantee integrity between the sections that are positioned adjacent to each other after the update requesting section has been updated, and generate, based on the update-purpose map database, one of the update data files regarding the update requesting section as well as other ones of the update data files regarding the update requiring sections and having the update versions indicated as the guaranty versions.

Growing community of inventors

Okazaki, Japan

Kimiyoshi Sawai