NAVIGATION APPARATUS, NAVIGATION METHOD AND NAVIGATION PROGRAM
PROBLEM TO BE SOLVED: To accurately calculate a vehicle position, in comparison with a conventional apparatus, even if a branch has a small branch angle. SOLUTION: The navigation apparatus is provided with a current position information calculating section 21, and a Y-shape branch determining sectio...
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| creator | ASAOKA NORIAKI |
| description | PROBLEM TO BE SOLVED: To accurately calculate a vehicle position, in comparison with a conventional apparatus, even if a branch has a small branch angle. SOLUTION: The navigation apparatus is provided with a current position information calculating section 21, and a Y-shape branch determining section 22. The current position information calculating section 21 obtains a current position P, based on a wireless signal from a GPS satellite and identifies the vehicle position Q on map data, based on the predetermined map data and the current position P. The Y-shape branch determining section 22 determines whether there is the branch having a branch point, at which a branch road candidate is branched from a branch source road candidate within a predetermined range in the travelling direction, based on the obtained current position P, calculates a distance D2 between the current position P and a road link of the branch source road candidate, at which the vehicle position Q corresponding to the current position P exists, and a distance D3 between the current position P and a road link of the branch road candidate, at which a virtual vehicle position R corresponding to the current position P exists, if there is the branch, and determines whether a vehicle enters into the branch road candidate by comparing the distances D2, D3. COPYRIGHT: (C)2009,JPO&INPIT |
| format | Patent |
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SOLUTION: The navigation apparatus is provided with a current position information calculating section 21, and a Y-shape branch determining section 22. The current position information calculating section 21 obtains a current position P, based on a wireless signal from a GPS satellite and identifies the vehicle position Q on map data, based on the predetermined map data and the current position P. The Y-shape branch determining section 22 determines whether there is the branch having a branch point, at which a branch road candidate is branched from a branch source road candidate within a predetermined range in the travelling direction, based on the obtained current position P, calculates a distance D2 between the current position P and a road link of the branch source road candidate, at which the vehicle position Q corresponding to the current position P exists, and a distance D3 between the current position P and a road link of the branch road candidate, at which a virtual vehicle position R corresponding to the current position P exists, if there is the branch, and determines whether a vehicle enters into the branch road candidate by comparing the distances D2, D3. 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SOLUTION: The navigation apparatus is provided with a current position information calculating section 21, and a Y-shape branch determining section 22. The current position information calculating section 21 obtains a current position P, based on a wireless signal from a GPS satellite and identifies the vehicle position Q on map data, based on the predetermined map data and the current position P. The Y-shape branch determining section 22 determines whether there is the branch having a branch point, at which a branch road candidate is branched from a branch source road candidate within a predetermined range in the travelling direction, based on the obtained current position P, calculates a distance D2 between the current position P and a road link of the branch source road candidate, at which the vehicle position Q corresponding to the current position P exists, and a distance D3 between the current position P and a road link of the branch road candidate, at which a virtual vehicle position R corresponding to the current position P exists, if there is the branch, and determines whether a vehicle enters into the branch road candidate by comparing the distances D2, D3. 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SOLUTION: The navigation apparatus is provided with a current position information calculating section 21, and a Y-shape branch determining section 22. The current position information calculating section 21 obtains a current position P, based on a wireless signal from a GPS satellite and identifies the vehicle position Q on map data, based on the predetermined map data and the current position P. The Y-shape branch determining section 22 determines whether there is the branch having a branch point, at which a branch road candidate is branched from a branch source road candidate within a predetermined range in the travelling direction, based on the obtained current position P, calculates a distance D2 between the current position P and a road link of the branch source road candidate, at which the vehicle position Q corresponding to the current position P exists, and a distance D3 between the current position P and a road link of the branch road candidate, at which a virtual vehicle position R corresponding to the current position P exists, if there is the branch, and determines whether a vehicle enters into the branch road candidate by comparing the distances D2, D3. COPYRIGHT: (C)2009,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ADVERTISING APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE CRYPTOGRAPHY DIAGRAMS DISPLAY EDUCATION EDUCATIONAL OR DEMONSTRATION APPLIANCES GLOBES GYROSCOPIC INSTRUMENTS MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS NAVIGATION PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS PLANETARIA SEALS SIGNALLING SURVEYING TESTING TRAFFIC CONTROL SYSTEMS |
| title | NAVIGATION APPARATUS, NAVIGATION METHOD AND NAVIGATION PROGRAM |
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