Route Conversion Accuracy in Narrow Map Ranges
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Solution Overview
Problem
Conventional route conversion methods are ineffective when converting routes between different map data sets in a narrower range than a section of an electronic map, often resulting in incorrect route conversions.
Innovation Solution
A route conversion apparatus that includes a route conversion unit generating a second route based on location reference information from a first route, a storage unit storing a route verification model, and a route verification unit verifying the correctness of the second route using the second map data and the route verification model.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional route conversion method is used, then route conversion between different map data sets can be performed, but conversion accuracy deteriorates when the conversion range is narrower than one section of the electronic map
Solution Approach 1:
The patent segments the route conversion process into multiple independent verification steps. The route verification unit divides the conversion process into: (1) verifying whether the converted route exists in the second map data, (2) verifying whether the route passes through correct locations, and (3) verifying route continuity. This segmentation allows accurate verification even in narrow conversion ranges smaller than one electronic map section.
2Reliability
If conventional route conversion method is used, then route conversion can be performed, but reliability of the converted route deteriorates due to undetected errors
Solution Approach 1:
The patent implements a feedback mechanism where the route verification unit continuously checks the converted route against the second map data and provides feedback for correction. The verification results are fed back to the route conversion unit, which can then adjust the conversion process. This feedback loop ensures high reliability of the converted route while maintaining manageable system complexity through structured verification steps.
Solution Approach 2:
The patent performs preliminary verification actions before finalizing the converted route. The route verification unit checks multiple conditions (route existence, location accuracy, continuity) in advance before confirming the converted route. This preliminary action prevents erroneous routes from being accepted, thereby ensuring reliability without requiring overly complex real-time verification systems.
3Difficulty of detecting and measuring
If conventional route conversion method is used, then route conversion process can be completed, but detection of conversion errors becomes difficult in narrow ranges
Solution Approach 1:
The patent segments error detection into three distinct verification tasks: (1) checking if the converted route exists in the second map data, (2) verifying whether the route passes through correct locations by comparing with location reference information, and (3) checking route continuity. This segmentation makes error detection feasible even in narrow conversion ranges smaller than one electronic map section, where conventional methods fail.
Solution Approach 2:
The patent introduces location reference information as an intermediary element to facilitate error detection. The route verification unit uses location reference information from the first map data as a reference to verify the converted route in the second map data. This intermediary enables accurate error detection in narrow conversion ranges by providing a reliable comparison baseline.
Data Source
AI summary
The present disclosure provides a route conversion apparatus which enables, in a case where a first route based on first map data is converted into a second route based on second map data in a range which is narrower than a section of an electronic map, an error of the converted second route to be detected, and conversion into a correct second route to be performed. The route conversion apparatus 100 includes a route conversion unit 122a that generates a second route RT2 based on location reference information LRI of a first route RT1, a storage unit 121 that stores a route verification model RVM, and a route verification unit 122b that inputs the second map data MD2, the location reference information LRI, and the second route RT2 to the route verification model RVM to verify whether the second route RT2 is correct or incorrect.