摘要:
The invention provides a vehicle data analysis method that enables quantitative analysis of characteristics of vehicle data indicating transition in a driver's driving operation, and a vehicle data analysis system using this analysis method. A plurality of vehicle data are collected based a plurality of types of driving operations. Based on an evaluation criterion as an index for evaluating levels of the driving operations, the collected vehicle data are grouped into at least two groups. Characteristic values of the vehicle data differing between these groups are extracted.
摘要:
An information providing system includes an obtaining portion that obtains image information captured by a moving object traveling on a road, and an information providing portion that provides the obtained image information, and additional information related to the image information.
摘要:
There is provided a map information providing technology that can keep map information very fresh at all times.A map information management system has a map to be updated DB for storing map data to be updated that is used to update and maintenance, a map to be provided DB for storing map data to be provided that is distributed, an updated data DB for storing updated data for updating the map data to be provided, a map DB update means for updating the map data to be updated when the updated data for updating the map data of the map data to be updated DB is input, an updated data creation mean for creating the differential data before and after it is updated by the updated data and storing the differential data in the updated data DB as the updated data, and a data distribution means for extracting the map data to be provided or the updated data stored in the map to be provided DB when it receives a request to distribute the map data or the updated data from a destination system and distributing it to the destination system.
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:
A CPU of a navigation apparatus stores public keys to which priorities are set and which are published by an information distribution center in a public key storage section. The CPU of the navigation apparatus extracts an electronic signature of distribution data which is distributed from the information distribution center and verifies the electronic signature by using only ‘valid’ public keys among the public keys in order of the priorities. The CPU of the navigation apparatus determines that the distribution data is valid information which is distributed from the information distribution center when the electronic signature passes verification.
摘要:
Systems, methods, and programs store navigation map data divided into a plurality of partitions, each partition having a corresponding partition file. The systems, methods, and programs identify a partition file corresponding to a partition that is to be updated. The partition file has an update-targeted road class The systems, methods, and programs select an update file, the update file being selected from a server file corresponding to the partition file to be updated. The server file is managed by version and road class. The selected update file is selected based on the update-targeted road class.
摘要:
When the navigation apparatus 5 performs a difference update on navigation map data 39 based on difference update data 17 distributed from a map distribution center 2, the difference update data 17 used in the difference update is stored into a navigation HDD 32, when the navigation apparatus 5 performs a total update on the navigation map data 39 thereafter, the navigation apparatus 5 performs a difference update again (S17) by using any piece of the difference update data stored in the navigation HDD 32 of which the version is newer than that of total update data. After performing the update, the navigation apparatus 5 deletes the pieces of difference update data 17 from the navigation HDD 32 that have been stored up to that point in time (S18).
摘要:
In a communication system for downloading programs from a center to in-vehicle terminals, a center can check whether downloading has been completed normally or a program is operating normally in an in-vehicle terminal. According to the timing of activating a downloaded program, an in-vehicle terminal checks whether the program is activated to operate normally. The information is transmitted to the center. Based on the information, the center becomes aware of the fact that downloading has been completed without any problem and that the program is operating normally in the in-vehicle terminal.
摘要:
A remote navigation device and navigation system which can reduce communications costs by minimizing route guidance data transmitted to an in-vehicle navigation device is configured so that it can obtain guide area information specifying areas where guidance is not needed. When generating route guidance data to be transmitted to an in-vehicle navigation device, the remote navigation device removes the routes which pass through areas where route guidance is not needed, and generates route guidance data for just the other routes. By transmitting only such route guidance data to the in-vehicle navigation device, the amount of transmitted data can be reduced.
摘要:
An electronic air-fuel mixture control system is adapted to an internal combustion engine to determine an optimum air-fuel ratio in dependence upon renewal of a plurality of learning values related to a plurality of load regions of the engine. The control system is arranged to conduct simultaneous learning of the learning values at a frequency in accordance with lapse of time and to conduct selective learning of the learning values in accordance with change of the load acting on the engine.