Map evaluation system and map evaluation method
First Claim
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1. A map evaluation system comprising:
- a map data storage unit configured to store map data indicating a road map;
an absolute position detector configured to detect an absolute position of a vehicle;
an on-map position acquisition unit configured to acquire an on-map position of the vehicle using the detected absolute position, the on-map position being based on a road map indicated by the stored map data;
a track storing unit configured to store, as travel track information, absolute positions detected by the absolute position detector in association with on-map positions acquired by using the detected absolute positions when the vehicle travels; and
a map reliability degree setting unit configured to set as a reliability degree of the map data, an error of the map data relative to the travel track information by comparing the travel track information with the map data.
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Abstract
An absolute position detector of a navigation device detects an absolute position of a vehicle. An on-map position of the vehicle is acquired based on the detected absolute position to be on a road map indicated by map data stored in the navigation device. Absolute positions detected by the absolute position detector are stored in association with on-map positions acquired based on the detected absolute positions as travel track information when the vehicle travels. An error of the map data as a reliability degree of the map data is set by comparing the travel track information with the map data.
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Citations
12 Claims
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1. A map evaluation system comprising:
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a map data storage unit configured to store map data indicating a road map; an absolute position detector configured to detect an absolute position of a vehicle; an on-map position acquisition unit configured to acquire an on-map position of the vehicle using the detected absolute position, the on-map position being based on a road map indicated by the stored map data; a track storing unit configured to store, as travel track information, absolute positions detected by the absolute position detector in association with on-map positions acquired by using the detected absolute positions when the vehicle travels; and a map reliability degree setting unit configured to set as a reliability degree of the map data, an error of the map data relative to the travel track information by comparing the travel track information with the map data. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A map evaluation method for setting a reliability degree of map data in a map data storage unit, the method comprising:
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detecting an absolute position of a vehicle by using an absolute position detector; acquiring an on-map position of the vehicle by using the detected absolute position, the on-map position being based on a road map indicated by the stored map data; storing, as travel track information, absolute positions detected by the absolute position detector in association with on-map positions acquired by using the detected absolute positions when the vehicle travels; and setting as a reliability degree of the map data, an error of the map data relative to the travel track information by comparing the travel track information with the map data. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification