On-vehicle path guide apparatus and path search method
First Claim
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1. An on-vehicle path guide apparatus comprising:
- current position detecting means for detecting a current position of an own vehicle;
setting means for setting a destination;
path search road network data storage means in which network data showing a road attribute and connection of a road is stored;
path search index data storage means for storing path information about whether or not each link connection to a node may reach other nodes as path search index data;
path search index data searching means for searching for and obtaining a recommended path from a node near the current position to a node near the destination by selecting a link that may reach the node near the destination based on path search road network data and the path search index data; and
path search control means for controlling the operations of the current position detecting means, the setting means, the path search road network data storage means, and the path search index data searching means, and providing to a passenger the obtained recommended path through an indicating means.
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Abstract
In an on-vehicle path guide apparatus and a path search method, by using path search network data and path search index data, path search index data searching device searches for a recommended path from a current position of an own vehicle to a set destination in stages and at high speed so as to guide a passenger. The data are selectively used according to a distance to the destination to efficiently search for the recommended path. The path search index data has a hierarchical structure, and a small capacity memory is mounted.
65 Citations
20 Claims
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1. An on-vehicle path guide apparatus comprising:
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current position detecting means for detecting a current position of an own vehicle; setting means for setting a destination; path search road network data storage means in which network data showing a road attribute and connection of a road is stored; path search index data storage means for storing path information about whether or not each link connection to a node may reach other nodes as path search index data; path search index data searching means for searching for and obtaining a recommended path from a node near the current position to a node near the destination by selecting a link that may reach the node near the destination based on path search road network data and the path search index data; and path search control means for controlling the operations of the current position detecting means, the setting means, the path search road network data storage means, and the path search index data searching means, and providing to a passenger the obtained recommended path through an indicating means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An on-vehicle path guide apparatus comprising:
- current position detecting means for detecting a current position of an own vehicle;
path search road network data storage means in which network data showing a road attribute and connection of a road is stored; path search index data storage means in which path information between nodes is stored as path search index data; path search index data searching means for searching for and obtaining a recommended path from a node near the current position to a node near the destination by using path search road network data and the path search index; and path search control means for controlling the operations of the current position detecting means, the setting means, the path search road network data storage means and the path search index data searching means, and providing to a passenger the obtained recommended path through an indicating means, wherein path information to each area encompassing said nodes is stored in the form of path search index data in the path search index data storage means, and the path search index data searching means searches for a recommended path from a main road in the vicinity of the current position of the own vehicle to an area in which the destination is located by using the path search index data.
- current position detecting means for detecting a current position of an own vehicle;
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17. A path search method comprising the steps of:
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detecting a current position of an own vehicle; setting a destination; searching for a recommended path from a node near the current position of the own vehicle to a node near the destination by selecting a link that may reach the node near the destination by using network data about a road attribute and connection of a main road and path search index data as path information showing whether or not each link connected to a node may reach other nodes; and indicating the recommended path obtained by the search to a passenger. - View Dependent Claims (18, 19, 20)
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Specification