Patent ID: 8825386

Claim:
A navigation apparatus for providing guidance to guide a vehicle through a predetermined route to a destination, the navigation apparatus configured to learn a new road, which does not exist in a ready-made road data, based on a current position of the vehicle during running of the vehicle, the navigation apparatus comprising: a processor, the processor being configured to: create, in a learned road detector, a learned road link connecting an exit point in a first existing link to a return point in a second existing link, the first and second existing links existing in the ready-made road data; store, in a road information storing device, road information based on at least one of the first and second existing links, the road information representing that the at least one of the first and second existing links forms a continuous road at an end of the learned road link; identify, in a link identifying device, an entrance link into the end of the learned road link and an exit link from the end of the learned road link in the route; determine, in a road determination device, whether the entrance and exit links form the continuous road represented by the road information; and prohibit, in a guidance device, the guidance on a direction to go at the end of the learned road link when the road determination device determines that the entrance and exit links form the continuous road represented by the road information, wherein the learned road detector creates a first auxiliary link extending from a first end of a base link to the end of the learned road link and a second auxiliary link extending from a second end of the base link to the end of the learned road link, the base link is the at least one of the first and second existing link, the road information storing device stores an association between the base link and each of the first and second auxiliary links as the road information, the link identifying device identifies at least one of the entrance and exit inks by using the first and second auxiliary links, and the road determination device determines that the entrance and exit links form the continuous road represented by the road information, when the entrance and exit links are identified as the first and second auxiliary links extending along the same base link.