Method and system for providing a preview of a route calculated with a navigation system
First Claim
1. A geographic database construction for representing navigable road segments located in a geographic region, comprising:
- data entities of a first type; and
data entities of a second type,wherein each navigable road segment is represented by at least one separate data entity of said first type,wherein each data entity of said first type contains navigable attributes of the road segment represented thereby,and further wherein each name by which a road segment represented by a data entity of said first type is represented by a data entity of said second type,and wherein said data entities of said first type are located together in the geographic database separate from the data entities of said second type,and further wherein each data entity of said first type include a reference to that data entity of said second type that contains the name by which the road segment represented by the data entity of said first type is known.
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Abstract
A navigation system uses a geographic database to determine a solution route to a destination and provides detailed maneuvering guidance for following the solution route. In addition, the navigation system includes a preview function that provides a summary of the solution route prior to providing the detailed maneuvering guidance for following the solution route. The preview function is included in the programming of the navigation system. The preview function uses a feature incorporated in the geographic database wherein the portion of the geographic database used by the navigation system when determining a solution route includes references to another portion of the database that includes the actual text of the names of the roads represented thereby. As the navigation system uses the data in the geographic database to determine the solution route, data representing the roads in the solution route are saved, including the references to the other portion of the geographic database that includes the actual text of the names of the roads. After the solution route is determined, the preview function evaluates the data representing the roads in the solution route and provides a list of route preview data structures. The list of route preview data structures includes the references to the portion of the geographic database that includes the actual text of the names of the roads. The list of route preview data structures is used to provide the user of the navigation system with a preview that contains a summary of the solution route. The preview provided to the user can include the names of the roads in the solution route. The names can be obtained from the geographic database using the references contained in the list of route preview data structures. When obtaining the names, the references can be reordered to facilitate accessing the text of the names quickly. By providing a preview of the calculated route, the user is familiarized with the route prior to being given detailed guidance for following the route.
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Citations
20 Claims
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1. A geographic database construction for representing navigable road segments located in a geographic region, comprising:
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data entities of a first type; and data entities of a second type, wherein each navigable road segment is represented by at least one separate data entity of said first type, wherein each data entity of said first type contains navigable attributes of the road segment represented thereby, and further wherein each name by which a road segment represented by a data entity of said first type is represented by a data entity of said second type, and wherein said data entities of said first type are located together in the geographic database separate from the data entities of said second type, and further wherein each data entity of said first type include a reference to that data entity of said second type that contains the name by which the road segment represented by the data entity of said first type is known. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a geographic database containing data that represent navigable road segments located in a geographic region, wherein said geographic database includes data entities of a first type and data entities of a second type, wherein each navigable road segment is represented by at least one separate data entity of said first type, wherein each data entity of said first type contains navigable attributes of the road segment represented thereby, and further wherein each name by which a road segment represented by a data entity of said first type is represented by a data entity of said second type, and wherein said data entities of said first type are located together in the geographic database separate from the data entities of said second type, wherein the improvement comprises:
in each data entity of said first type that represents a road segment known by a name, an indication contained in said data entity of said first type of the name by which the represented road segment is known. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A geographic database construction for representing navigable road segments located in a geographic region and that facilitates a presentation of a preview of a calculated route, the geographic database construction comprising:
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plural sets of data comprising; routing data that include a first set of data entities representing the navigable road segments and containing data used for route calculation; and name data that include a second set of data entities containing names of the navigable road segments, wherein each of the data entities of the first set that represents a navigable road segment that is known by a name includes a reference to a data entity in the second set that contains the name. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification