Map Information Generation System for New Road Positioning
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Solution Overview
Problem
Existing map information generation technologies often result in inaccurate positioning of new roads due to inaccuracies in initial position matching and error accumulation from GPS and other sensors, leading to incorrect connections between new and existing roads.
Innovation Solution
A map information generation system that acquires and corrects the movement track of a mobile body to approach an existing road, identifying sections that do not correspond to the existing road as new roads, thereby improving positional accuracy by leveraging GPS, gyro, and vehicle speed sensors to refine the position estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the splitting position of a link is decided from the initial position at which matching is not established, then the new road can be created, but the position accuracy of the new road deteriorates
Solution Approach 1:
The system performs preliminary actions by acquiring movement tracks before the vehicle reaches the new road section, using existing road matching to establish accurate initial positions. This preliminary data acquisition enables subsequent accurate positioning of the new road without relying on inaccurate initial positions.
Solution Approach 2:
The system uses feedback from the movement track correction process, where the corrected movement track is used to adjust the splitting position and link creation. This feedback loop ensures that the new road position is refined based on actual vehicle movement data rather than relying solely on potentially inaccurate initial positions.
2Ease of operation
If the location immediately before and after the state in which the position on a road cannot be estimated is used, then the track can be corrected, but the position accuracy of the new road deteriorates
Solution Approach 1:
The system acquires movement tracks in advance before the vehicle enters the new road section, using periods when the vehicle is on known roads to establish accurate reference positions. This preliminary action provides the foundation for accurate new road positioning without needing to rely on inaccurate transitional positions.
Solution Approach 2:
The system introduces an intermediary approach by using the corrected movement track as a mediator between the raw GPS data and the final new road position. The corrected movement track, which is refined using surrounding road network information, serves as an intermediate step that improves positioning accuracy.
3Productivity
If the detected position is compulsorily converted into a position on a road, then the map matching process can be completed, but the position accuracy deteriorates
Solution Approach 1:
The system performs preliminary correction of the movement track using road network information before the final position determination. By preparing corrected movement tracks in advance and using them during the map matching process, the system maintains both efficiency and accuracy.
Solution Approach 2:
The system incorporates feedback from the corrected movement track into the map matching process. The corrected movement track, which has been refined using surrounding road data, provides feedback that adjusts the final position determination, ensuring accuracy while maintaining process efficiency.
Data Source
AI summary
Map information generation systems, methods, and programs acquire a movement track of a mobile body, and correct a position of the movement track such that the movement track approaches an existing road. The systems, methods, and programs acquire a section in which the corrected movement track does not correspond to the existing road as a new road, and add information that indicates the new road to map information.