摘要:
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 L1 which 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 L2 which does not have a corresponding link existing at a higher level.
摘要:
A computer readable medium having stored thereon road-map-data including pieces of link information having different accuracy levels based on the accuracies of sources of the link information, whereby a computer is able to appropriately configure road-network data, on the basis of an accuracy level given in each of the pieces of link information. The road-map-data includes the road-network data representing roads as links and including connection relationships among the links, and the pieces of link information used to configure the road network data. Each piece of link information for a given link includes accuracy level information based on the accuracy of the source of that piece of link information.
摘要:
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 L1 which 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 L2 which does not have a corresponding link existing at a higher level.
摘要:
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.
摘要:
Art is provided that is capable of easily performing update processing in a short time even when updating numerous data of a storage medium of a navigation device. A directory structure corresponding to a partition structure of a storage medium is created. Image files IF are generated for updated data content within partitions HDn (n=0, 1, 2, 4, 6). The generated image files IF of the partitions HDn are stored in directories DIR that correspond to the partitions HDn in the created directory structure. Data content of the image files IF read from the directories DIR that correspond to the partitions HDn is written to the partitions HDn of the storage medium.
摘要:
Art is provided that is capable of easily performing update processing in a short time even when updating numerous data of a storage medium of a navigation device. A directory structure corresponding to a partition structure of a storage medium is created. Image files IF are generated for updated data content within partitions HDn (n=0, 1, 2, 4, 6). The generated image files IF of the partitions HDn are stored in directories DIR that correspond to the partitions HDn in the created directory structure. Data content of the image files IF read from the directories DIR that correspond to the partitions HDn is written to the partitions HDn of the storage medium.
摘要:
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.
摘要:
Systems, methods, and programs create a road map data structure, the data structure including road network data in which a road is represented by a plurality of links connected in a link string. The systems, methods, and programs assign a link ID to each of the links of the road network data. For each link, the link ID has a numerical range set in accordance with both a length of the link and a road attribute, and the link ID is set sequentially in a connection order within the link string.
摘要:
To provide a data updating system and the like for easily performing updating the difference for the database which contains a large amount of data, each piece of the data being highly correlated, such as a map database that contains road network data.According to the present invention, the data updating system includes a terminal device running according to a predefined operating program, and servers providing the terminal device with a differential data file for updating a database. The terminal includes a local database in an updating data format differing from a reference data format to be referenced to by the operating program and being updated with the differential data file, and a conversion means converting data stored in the local database so as to have the reference data format. The servers include a differential data file output means outputting the differential data file to be provided to the terminal device.
摘要:
Map updating systems, methods, and programs create instruction data in a data center used for updating a pre-update piece of map structuring data among a plurality of pieces of stored map structuring data to a post-update piece of map structuring data, the instruction data identifying, in units of bytes, a portion of the pre-update piece of map structuring data to be updated and a post-update data content. The systems, methods, and programs then update the pre-update piece of map structuring data in a mobile device to the post-update piece of map structuring data according to the instruction data by updating, in units of bytes, the portion of the pre-update piece of map structuring data to be updated that has been identified by the instruction data so that the portion includes the post-update data content identified by the instruction data.