Method and apparatus for identifying geographic locations
First Claim
1. A computer-implemented method for assigning identifiers to geographic locations within digital map data, the method comprising:
- selecting a region within the map data;
dividing the region into a first plurality of cells each uniquely addressable by an identifier of a first length;
selecting a portion of the region; and
dividing the portion into a second plurality of cells each uniquely addressable by an identifier of a second length, wherein the second length is shorter length than the first length and a geographic location within the portion of the region may be uniquely identified by an identifier of the first length and an identifier of the second length.
2 Assignments
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Accused Products
Abstract
Embodiments of the present invention provide a computer-implemented method for assigning identifiers to geographic locations within digital map data, comprising selecting a region within the map data, dividing the region into a first plurality of cells each uniquely addressable by an identifier of a first length, selecting a portion of the region and dividing the portion into a second plurality of cells each uniquely addressable by an identifier of a second length, wherein the second length is shorter length than the first length and a geographic location within the portion of the region may be uniquely identified by an identifier of the first length and an identifier of the second length.
4 Citations
20 Claims
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1. A computer-implemented method for assigning identifiers to geographic locations within digital map data, the method comprising:
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selecting a region within the map data; dividing the region into a first plurality of cells each uniquely addressable by an identifier of a first length; selecting a portion of the region; and dividing the portion into a second plurality of cells each uniquely addressable by an identifier of a second length, wherein the second length is shorter length than the first length and a geographic location within the portion of the region may be uniquely identified by an identifier of the first length and an identifier of the second length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A navigation device, comprising:
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a display screen for providing navigation information to a user; and a processor communicably coupled to a data store comprising a context table, wherein the context table comprises; a context identifier associated with a geographic region; information identifying a location of a firstly plurality of cells dividing at least a part of the geographic region, each cell being associated with a unique identifier of a first length; and information identifying a location of a second plurality of cells dividing one portions of the geographic region, each cell being associated with a unique identifier of a second length, wherein geographic locations within the second plurality of cells are uniquely identified by identifiers of the first and second lengths, and wherein the processor is arranged to receive, from a user, at least one identifier, and to determine at least one geographic location corresponding to the respective identifier from the context table. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A computer-implemented method, comprising:
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receiving, from a user, at least one identifier; accessing a data store comprising a context table, wherein the context table comprises; a context identifier associated with a geographic region; information identifying a location of a firstly plurality of cells dividing at least a part of the geographic region, each cell being associated with a unique identifier of a first length; and information identifying a location of a second plurality of cells dividing one portions of the geographic region, each cell being associated with a unique identifier of a second length, wherein geographic locations within the second plurality of cells are uniquely identified by identifiers of the first and second lengths; and determining at least one geographic location corresponding to the respective identifier from the context table. - View Dependent Claims (20)
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Specification