Systems and methods for cross-street identification
First Claim
1. A method, comprising:
- identifying a plurality of streets and at least one intersection thereof, the plurality of streets and the at least one intersection being associated with a region of interest of a map, each of the plurality of streets including at least one road segment;
extracting features from a map database for each road segment and the at least one intersection;
creating, for each intersection of interest, a set of road segments connected to that intersection and a relationship of each road segment in the set to that intersection, including whether a given road segment begins or ends at the intersection;
storing the set of road segments and their relationships to the intersection of interest in a cross-street database;
identifying all cross-streets of the intersection of interest by road segment IDs, each cross street comprising at least one of the road segments;
retrieving original features of interest from the map database;
filtering non-road segments from the original features of interest to obtain a set of filtered road segments;
matching each cross-street of the intersection of interest with the filtered road segments; and
storing the matched cross-streets in the cross-street database.
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Accused Products
Abstract
Aspects of the invention relate to the use of electronic maps and providing information about intersecting streets. A given region of interest on a map may include any number of features. Features of interest, including road segments and intersections, can be filtered to remove non-street data. The results may be analyzed according to individual street segments. Each segment may be identified by a feature ID, and the relationship each segment has with a given intersection is analyzed. Thus, the direction of a segment into or out of an intersection is determined, along with the physical locations of the beginning and end of the segment. This information is used to provide robust map information that may be displayed to a user. Heuristics can be applied to the map information to provide coherent address or direction information to the user for a given point of interest.
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Citations
9 Claims
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1. A method, comprising:
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identifying a plurality of streets and at least one intersection thereof, the plurality of streets and the at least one intersection being associated with a region of interest of a map, each of the plurality of streets including at least one road segment; extracting features from a map database for each road segment and the at least one intersection; creating, for each intersection of interest, a set of road segments connected to that intersection and a relationship of each road segment in the set to that intersection, including whether a given road segment begins or ends at the intersection; storing the set of road segments and their relationships to the intersection of interest in a cross-street database; identifying all cross-streets of the intersection of interest by road segment IDs, each cross street comprising at least one of the road segments; retrieving original features of interest from the map database; filtering non-road segments from the original features of interest to obtain a set of filtered road segments; matching each cross-street of the intersection of interest with the filtered road segments; and storing the matched cross-streets in the cross-street database. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A processing system for processing geographical map information, comprising:
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at least one processor; and memory for storing data, the memory being electrically coupled to the at least one processor; wherein the at least one processor is configured to identify a plurality of streets and at least one intersection thereof, the plurality of streets and the at least one intersection being associated with a region of interest of a map, each of the plurality of streets including at least one road segment, to extract features from a map database for each road segment and the at least one intersection, to create, for each intersection of interest, a set of road segments connected to that intersection and a relationship of each road segment in the set to that intersection, including whether a given road segment begins or ends at the intersection, and to store the set of road segments and their relationships to the intersection of interest in a cross-street database in the memory; and wherein the at least one processor is further configured to identify all cross-streets of the intersection of interest by road segment IDs, each cross street comprising at least one of the road segments, to retrieve original features of interest from the map database, to filter non-road segments from the original features of interest to obtain a set of filtered road segments, to match each cross-street of the intersection of interest with the filtered road segments, and to store the matched cross-streets in the cross-street database.
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9. A computer-readable recording medium having instructions stored thereon, the instructions, when executed by a processor, cause the processor to perform the operations of:
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identifying a plurality of streets and at least one intersection thereof, the plurality of streets and the at least one intersection being associated with a region of interest of a map, each of the plurality of streets including at least one road segment; extracting features from a map database for each road segment and the at least one intersection; creating, for each intersection of interest, a set of road segments connected to that intersection and a relationship of each road segment in the set to that intersection, including whether a given road segment begins or ends at the intersection; storing the set of road segments and their relationships to the intersection of interest in a cross-street database; identifying all cross-streets of the intersection of interest by road segment IDs, each cross street comprising at least one of the road segments; retrieving original features of interest from the map database; filtering non-road segments from the original features of interest to obtain a set of filtered road segments; matching each cross-street of the intersection of interest with the filtered road segments; and storing the matched cross-streets in the cross-street database.
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Specification