| 主权项 |
1. A road information update system comprising:
a navigation apparatus that includes:
a storage device that stores a first road map data;a travel trace detection device that detects a travel trace of a movable body; anda navigation-side communication device that transmits information to an outside of the navigation apparatus; and an information center that stores a second road map data, the information center including:
a center-side communication device that communicates with the navigation apparatus; anda model generation device that compares a plurality of road map data to extract a road change part in which an abandoned road and a new road are present, thereby generating a plurality of road change models based on the abandoned road and the new road, wherein the new road is a newly-constructed road, wherein: the navigation apparatus further includes
a travel trace information collection device that, at least when the movable body travels the new road not present in the first road map data, collects information on the travel trace in the new road, wherein the travel trace is detected by the travel trace detection device, wherein the navigation-side communication device sends the collected information on the travel trace of the traveling of the new road to the information center; the information center further includes
an estimation device that, upon receipt of the information on the travel trace in the new road from the navigation apparatus, estimates the new road and the abandoned road based on (i) the received information on the travel trace in the new road and (ii) the road change models generated by the model generation device; and the information center incorporates the new road and the abandoned road estimated by the estimation device into the second road map data; a plurality of road change models is generated by comparing a latest road map data, which has been updated most recently, with an old road map data, which was used in the past and is older than the latest road map data; each road change model comprises a set of the new road and the abandoned road at a particular cite, the new road and the abandoned road appearing due to a road change at the particular cite between the old road map data and the latest road map data; the navigation apparatus is configured to set a destination point and configured to send information on the destination point and a departure point of the movable body to the information center; the navigation apparatus is further configured to perform, by using the first road map data, a process of calculating a first route from the departure point to the destination point and a process of calculating guidance information of the calculated first route; the information center also has the first road map data and is configured to:
receive the information on the destination point and the departure point of the movable body from the navigation apparatus;perform, by using the first road map data, the process of calculating the first route from the departure point to the destination point and the process of calculating the guidance information of the calculated first route;perform, by using the second road map data, a process of calculating a second route from the departure point to the destination point and a process of calculating guidance information of the calculated second route;compare the guidance information of the first route with the guidance information of the second route; andsend guidance information cancellation information and guidance information addition information to the navigation apparatus, wherein the guidance information cancellation information is provided for cancellation of the guidance information that is present in the first route but is not present in the second route, wherein the guidance information addition information is provided for addition of the guidance information that is not present in the first route but is present in the second route; and the navigation apparatus is configured to
receive the guidance information cancellation information and the guidance information addition information from the information center; andincorporate the cancellation of the guidance information and the addition of the guidance information into the guidance information of the first route based on the received guidance information cancellation information and the received guidance information addition information. |
