Electronic navigation system and method
First Claim
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1. A system for providing geographic information comprising:
- a base unit having a processor and a geographic database;
wherein said base unitreceives a request for a point of interest located within a specified driving distance from a mobile device, the request comprising an origin of said mobile unit, a point of interest category and a driving distance limit, wherein the driving distance limit indicates a maximum driving distance from the origin to a point of interest,after the receiving the request step, identifies a driving route comprising a plurality of connected paths represented in the geographic database over which the mobile unit could travel from said origin to a point of interest matching said point of interest category;
after the identifying the driving route step, calculates a driving distance for said identified driving route from the origin to said point of interest matching said point of interest category;
after the calculating the driving distance step, if said calculated driving distance is less than said driving distance limit, provides the response to said mobile unit identifying said point of interest matching said point of interest category and having said driving distance less than said driving distance limit.
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Abstract
The invention provides a system for providing geographic information. The system includes a base unit that receives a request from a mobile unit and provides a response to the mobile unit. The request includes a point of interest category and a traveling distance or traveling time parameter. The base unit identifies a point of interest that matches the point of interest category and satisfies the traveling distance or traveling time parameter. The response from the base unit to the mobile unit provides the identified point of interest.
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Citations
20 Claims
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1. A system for providing geographic information comprising:
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a base unit having a processor and a geographic database; wherein said base unit receives a request for a point of interest located within a specified driving distance from a mobile device, the request comprising an origin of said mobile unit, a point of interest category and a driving distance limit, wherein the driving distance limit indicates a maximum driving distance from the origin to a point of interest, after the receiving the request step, identifies a driving route comprising a plurality of connected paths represented in the geographic database over which the mobile unit could travel from said origin to a point of interest matching said point of interest category; after the identifying the driving route step, calculates a driving distance for said identified driving route from the origin to said point of interest matching said point of interest category; after the calculating the driving distance step, if said calculated driving distance is less than said driving distance limit, provides the response to said mobile unit identifying said point of interest matching said point of interest category and having said driving distance less than said driving distance limit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for providing geographic information from a base unit to a mobile unit, the method comprising:
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receiving a request for a point of interest reachable within a travel time by said mobile unit from said mobile unit, said request including a point of interest category and a travel time limit, wherein the travel time limit specifies a maximum travel time to travel from the origin to a point of interest; searching by said base unit outward from a current position of said mobile unit for road segments that may be traveled from said current position to reach a point of interest matching said point of interest category, wherein said base unit searches using a geographic database having data representing said road segments and data representing said point of interest; and determining by said base unit a travel time required for traveling from said current position over said road segments to said point of interest matching said point of interest category; if said determined travel time is less than said travel time limit, providing a response by said base unit to said mobile unit identifying said point of interest matching said point of interest category and having said travel time less than said travel time limit. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A system for providing geographic information comprising:
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a base unit; and a geographic database associated with said base unit, said geographic database having data representing a plurality of road segments in a geographic region and data representing a plurality of points of interest in said geographic region; wherein said base unit receives a request for a point of interest located within a specified driving distance from a mobile unit, said request comprising an origin of said mobile unit, a point of interest category, and a driving distance limit, wherein said driving distance limit indicates a maximum driving distance from said origin to said point of interest, then searches outward from said origin of said mobile unit to identify a driving route comprising a plurality of connected road segments over which said mobile unit could travel to a point of interest matching said point of interest category, then determines a driving distance for said identified driving route from said origin of said mobile unit to said point of interest matching said point of interest category, and provides, if said determined driving distance is less than said driving distance limit, a response to said mobile unit indicating said point of interest matching said point of interest category and having said driving distance less than said driving distance limit. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification