Route planning method for hierarchical map routing and apparatus therefor
First Claim
1. A route planning method for constructing a route connecting a given origin location and a given destination location from a hierarchical map database having a plurality of layers each layer representing a different level of detail, the method comprising the steps of:
- providing a list of road segments extracted from an initial planning layer of the hierarchical map database, wherein each of the road segments in the list of road segments are connected to the given origin location; and
selecting an alternative planning layer dependent on exceeding a predetermined heading criteria measured between a heading associated with one of the road segments in the list of road segments and a heading associated with the given destination location.
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Accused Products
Abstract
A route planning method, and apparatus, for constructing a route connecting a given origin location and a given destination location from a hierarchical map database having more than one layer, where each layer represents a different level of detail. The method includes provision of a list of road segments extracted from an initial planning layer of the hierarchical map database, wherein each of the road segments in the list of road segments are connected to the given origin location. An alternative planning layer is selected dependent on exceeding a predetermined heading criteria measured between a heading associated with heading associated with one of the road segments in the list of road segments and a heading associated with the given destination location.
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Citations
26 Claims
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1. A route planning method for constructing a route connecting a given origin location and a given destination location from a hierarchical map database having a plurality of layers each layer representing a different level of detail, the method comprising the steps of:
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providing a list of road segments extracted from an initial planning layer of the hierarchical map database, wherein each of the road segments in the list of road segments are connected to the given origin location; and selecting an alternative planning layer dependent on exceeding a predetermined heading criteria measured between a heading associated with one of the road segments in the list of road segments and a heading associated with the given destination location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A route planning method for constructing a route connecting a given origin location and a given destination location from a hierarchical map database having a plurality of layers each layer representing a different level of detail, the method comprising the steps of:
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providing a list of road segments extracted from an initial planning layer of the hierarchical map database, wherein each of the road segments in the list of road segments are connected to the given origin location; selecting a candidate road segment from the list of road segments provided in said step of providing; selecting another planning layer from the plurality of layers of the hierarchical map database, the selection dependent on a distance between the given destination location and a location associated with the candidate road segment; extracting at least one successor road segment, connected to the candidate road segment, from a current planning layer corresponding one of the initial planning layer and the another planning layer; determining if the at least one successor road segment provides a connection path to the given destination location; and selecting an alternative planning layer dependent on exceeding a predetermined heading criteria measured between a heading associated with the at least one successor road segment and a heading associated with the given destination location. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus for constructing a route connecting a given origin location and a given destination location from a hierarchical map database having a plurality of layers each layer representing a different level of detail, the apparatus comprising:
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means for providing a list of road segments extracted from an initial planning layer of the hierarchical map database, wherein each of the road segments in the list of road segments are connected to the given origin location; and means for selecting an alternative planning layer dependent on exceeding a predetermined heading criteria measured between a heading associated with one of the road segments in the list of road segments and a heading associated with the given destination location. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification