Navigation apparatus and method
First Claim
Patent Images
1. A navigation apparatus comprising:
- a processing resource configured to;
receive, for each of a plurality of road segments of a digital map, a classifier associated with the road segment, each classifier being one of a set of general classifiers of road segment properties;
receive weather-related data, the weather related data comprising a plurality of speed modification factors, each speed modification factor associated with a different classifier in the set of general classifiers, and each speed modification factor computed based on a weather condition and a reaction of roads having the corresponding classifier to the weather condition;
for each of the plurality of road segments, modify speed data for the road segment by;
using the classifier associated with the road segment to determine a selected speed modification factor from among the plurality of speed modification factors; and
modifying the speed data based on a product of an expected speed of travel for the road segment for normal conditions and the selected speed modification factor; and
perform a navigation operation using the modified speed data, wherein the navigation operation comprises at least one of determining and providing a route to a destination and determining and providing an estimated time of arrival (ETA).
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Abstract
A navigation apparatus 200 comprises a processing resource 260 configured to: determine a route to a selected destination; obtain weather-related data; and modify speed data for a plurality of route segments in dependence on the weather-related data. For each route there is a respective classifier that classifies the road type for the route segment, and the processing resource is configured to modify the speed data for each route segment based on the weather-related data and the road type represented by the classifier for that route segment.
56 Citations
20 Claims
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1. A navigation apparatus comprising:
a processing resource configured to; receive, for each of a plurality of road segments of a digital map, a classifier associated with the road segment, each classifier being one of a set of general classifiers of road segment properties; receive weather-related data, the weather related data comprising a plurality of speed modification factors, each speed modification factor associated with a different classifier in the set of general classifiers, and each speed modification factor computed based on a weather condition and a reaction of roads having the corresponding classifier to the weather condition; for each of the plurality of road segments, modify speed data for the road segment by; using the classifier associated with the road segment to determine a selected speed modification factor from among the plurality of speed modification factors; and modifying the speed data based on a product of an expected speed of travel for the road segment for normal conditions and the selected speed modification factor; and perform a navigation operation using the modified speed data, wherein the navigation operation comprises at least one of determining and providing a route to a destination and determining and providing an estimated time of arrival (ETA). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 20)
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12. A server system for providing weather-related data to at least one navigation apparatus, the server system comprising a processing resource configured to:
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obtain weather data; process the weather data to produce speed modification data, wherein the speed modification data comprises a plurality of speed modification factors, and wherein the processing comprises computing each speed modification factor based on a weather condition from the weather data and a reaction to the weather condition of roads having a corresponding classifier from a set of general classifiers; and transmit the speed modification data to the at least one navigation apparatus, wherein the speed modification factors in the speed modification data are configured to be used along with classifiers associated with road segments to compute speed data representative of an expected speed of travel due to weather conditions along the road segments. - View Dependent Claims (13, 14, 15, 18)
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16. A method of performing a navigation operation, comprising:
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receiving, by a processor, for each of a plurality of road segments of a digital map, a classifier associated with the road segment, each classifier being one of a set of general classifiers of road segment properties; receiving weather-related data, the weather related data comprising a plurality of speed modification factors, each speed modification factor associated with a different classifier in the set of general classifiers, and each speed modification factor computed based on a weather condition and a reaction of roads having the corresponding classifier to the weather condition; for each of the plurality of road segments, modifying speed data for the road segment by; using the classifier associated with the road segment to determine a selected speed modification factor from among the plurality of speed modification factors; and modifying the speed data based on a product of an expected speed of travel for the road segment for normal conditions and the selected speed modification factor; and performing, by the processor, a navigation operation using the modified speed data, wherein the navigation operation comprises at least one of determining and providing a route to a destination and determining and providing an estimated time of arrival (ETA).
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17. A non-transitory computer-readable medium comprising computer readable instructions that, when executed by a processing resource of a navigation apparatus, cause the navigation apparatus to perform a method comprising:
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receiving, by a processor, for each of a plurality of road segments of a digital map, a classifier associated with the road segment, each classifier being one of a set of general classifiers of road segment properties; receiving weather-related data, the weather related data comprising a plurality of speed modification factors, each speed modification factor associated with a different classifier in the set of general classifiers, and each speed modification factor computed based on a weather condition and a reaction of roads having the corresponding classifier to the weather condition; for each of the plurality of road segments, modifying speed data for the road segment by; using the classifier associated with the road segment to determine a selected speed modification factor from among the plurality of speed modification factors; and modifying the speed data based on a product of an expected speed of travel for the road segment for normal conditions and the selected speed modification factor; and performing a navigation operation using the modified speed data, wherein the navigation operation comprises at least one of determining and providing a route to a destination and determining and providing an estimated time of arrival (ETA). - View Dependent Claims (19)
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Specification