System and method for automated updating of map information
First Claim
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1. A system for automatically updating a map database, comprising:
- an input subsystem configured to provide vehicle readings, each vehicle reading corresponding to a vehicle and comprising a location of the vehicle;
a map database comprising information associated with roads; and
an information inference module configured to determine that a type of traffic control at an approach to an intersection is either a stop sign or a traffic light, the stop sign being indicated by substantially all the vehicle readings corresponding to the approach indicating substantially all vehicles stopping, and the traffic light being indicated by a first portion of the vehicle readings corresponding to the approach indicating vehicles stopping at the intersection at some times and a second portion of the vehicle readings corresponding to the approach indicating vehicles not stopping at other times, the information inference module further configured to update the map database to reflect the type of traffic control.
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Abstract
Traffic information readings corresponding to a vehicle are received, the readings including at least a location. The traffic information readings are compared to information already within a map database, and are used to derive additional map information augmenting or correcting that already within the database, the additional map information subsequently being stored in the database. Additional information that is derived includes the presence of stop signs and traffic lights at intersections, the legality of turns at certain times of day, and the connectedness or non-connectedness of road segments.
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Citations
12 Claims
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1. A system for automatically updating a map database, comprising:
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an input subsystem configured to provide vehicle readings, each vehicle reading corresponding to a vehicle and comprising a location of the vehicle; a map database comprising information associated with roads; and an information inference module configured to determine that a type of traffic control at an approach to an intersection is either a stop sign or a traffic light, the stop sign being indicated by substantially all the vehicle readings corresponding to the approach indicating substantially all vehicles stopping, and the traffic light being indicated by a first portion of the vehicle readings corresponding to the approach indicating vehicles stopping at the intersection at some times and a second portion of the vehicle readings corresponding to the approach indicating vehicles not stopping at other times, the information inference module further configured to update the map database to reflect the type of traffic control. - View Dependent Claims (2, 3, 4)
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5. A computer-based method for automatically updating a map database, comprising:
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receiving map information from the map database at a processor, the map database comprising information associated with roads; receiving vehicle readings at the processor, each vehicle reading corresponding to a vehicle and comprising a location of the vehicle; determining, via the processor, that a type of traffic control at an approach to an intersection is either a stop sign or a traffic light, the stop sign being indicated by substantially all the vehicle readings corresponding to the approach indicating substantially all vehicles stopping, and the traffic light being indicated by a first portion of the vehicle readings corresponding to the approach indicating vehicles stopping at the intersection at some times and a second portion of the vehicle readings corresponding to the approach indicating vehicles not stopping at other times; and updating the map database to reflect the type of traffic control. - View Dependent Claims (6, 7, 8)
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9. A non-transitory computer readable storage medium storing a computer program executable by a processor for automatically updating a map database, actions of the computer program comprising:
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receiving map information from the map database, the map database comprising information associated with roads; receiving vehicle readings, each vehicle reading corresponding to a vehicle and comprising a location of the vehicle; determining that a type of traffic control at an approach to an intersection is either a stop sign or a traffic light, the stop sign being indicated by substantially all the vehicle readings corresponding to the approach indicating substantially all vehicles stopping, and the traffic light being indicated by a first portion of the vehicle readings corresponding to the approach indicating vehicles stopping at the intersection at some times and a second portion of the vehicle readings corresponding to the approach indicating vehicles not stopping at other times; and updating the map database to reflect the type of traffic control. - View Dependent Claims (10, 11, 12)
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Specification