Automobile navigation system and road map delivery system
First Claim
1. A navigation system provided in a vehicle, the system comprising:
- a display device;
a position detector that detects a position of the vehicle as a detection position;
a map data storage unit that stores road map data;
a map matching unit that performs map matching that matches, based on the detection position and the road map data, the detection position with a point of a road in the road map data, wherein the point is defined to be a map matching position;
a display control unit that causes the display device to display the map matching position together with a road map based on the road map data;
a history storage unit that stores position history information including position information related to the detection position and position information related to the map matching position; and
a determination unit that, when the vehicle runs on a not-stored road that is not stored in the road map data, determines a trail of running of the vehicle from departure to comeback based on the position history information, wherein the departure is to depart from a first stored road that is stored in the road map data while the comeback is to back into a second stored road that is stored in the road map data.
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Accused Products
Abstract
A navigation system in a vehicle stores position history information including position information related to a detection position detected by a position detector and position information related to a map matching position. The map matching position is obtained by matching the detection position with a point of a road in road map data. When the vehicle runs on a not-stored road that is not stored in the road map data, the navigation system determines a trail of running of the vehicle from departure from a stored road that is stored in the road map data to comeback into a stored road that is stored in the road map data, based on the stored position history information.
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Citations
34 Claims
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1. A navigation system provided in a vehicle, the system comprising:
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a display device;
a position detector that detects a position of the vehicle as a detection position;
a map data storage unit that stores road map data;
a map matching unit that performs map matching that matches, based on the detection position and the road map data, the detection position with a point of a road in the road map data, wherein the point is defined to be a map matching position;
a display control unit that causes the display device to display the map matching position together with a road map based on the road map data;
a history storage unit that stores position history information including position information related to the detection position and position information related to the map matching position; and
a determination unit that, when the vehicle runs on a not-stored road that is not stored in the road map data, determines a trail of running of the vehicle from departure to comeback based on the position history information, wherein the departure is to depart from a first stored road that is stored in the road map data while the comeback is to back into a second stored road that is stored in the road map data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A navigation system provided in a vehicle, the system comprising:
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a display device;
a position detector that detects a position of the vehicle as a detection position, wherein the position detector carries out at least two positioning types different in accuracy of (i) high-accuracy positioning relatively high and (ii) low-accuracy positioning relatively low;
a map data storage unit that stores road map data;
a map matching unit that performs map matching that matches, based on the detection position and the road map data, the detection position with a point of a road in the road map data, wherein the point is defined to be a map matching position;
a display control unit that causes the display device to display the map matching position together with a road map based on the road map data;
a history storage unit that stores position history information, wherein (i) the position history information includes only position information related to the detection position when the high-accuracy positioning is carried out, and (ii) the position history information includes position information related to the detection position and position information related to the map matching position when the low-accuracy positioning is carried out; and
a determination unit that, when the vehicle runs on a not-stored road that is not stored in the road map data, determines a trail of running of the vehicle from departure from a first stored road that is stored in the road map data to comeback to a second stored road that is stored in the road map data, based on the position history information. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A road map delivery system comprising:
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at least one navigation system that is provided in a vehicle and includes;
a communication unit that communicates with an outside of the vehicle, a display device, a position detector that detects a position of the vehicle as a detection position, a map data storage unit that stores road map data, a map matching unit that performs map matching that matches, based on the detection position and the road map data, the detection position with a road point that is defined to be a map matching position, a display control unit that causes the display device to display the map matching position together with a road map based on the road map data, a history storage unit that stores position history information relating to position where the vehicle has run, and a determination unit that, when the vehicle runs on a not-stored road whose data is not stored in the map data storage unit, determines a trail of running of the vehicle from departure from a stored road that is stored in the road map data to comeback to a stored road that is stored in the road map data, based on the position history information stored in the history storage unit; and
a map data managing center that receives position information related to the not-stored road from the communication unit of the at least one navigation system and then transmits road data corresponding to the received information to the navigation system when the road data corresponding to the received information is present. - View Dependent Claims (32, 33, 34)
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Specification