Patent ID: 9068857
Filing Date: 2015-06-30
Classification: G01C

Abstract:
1. A navigation apparatus providing route guidance of a travel of a vehicle by utilizing (i) ready-made map data and (ii) learned road data, the apparatus comprising: an exit route determination unit configured to determine whether an exit route of a route guidance from a branch point corresponds to a learned road link of the learned road data; a route guidance unit configured to provide route guidance by presenting a progress direction toward the exit route from the branch point via outputting sound in both a first mode and a second mode, the first mode including an existing road link of the ready-made map data in determining the progress direction, and the second mode including the existing road link and the learned road link in determining the progress direction, wherein, the first mode and the second mode are different the route guidance unit is further configured to provide the progress direction of the route guidance in (i) the first mode when the exit route determination unit determines that the exit route from the branch point does not correspond to the learned road link, and (ii) the second mode when the exit route determination unit determines that the exit route from the branch point corresponds to the learned road link; and a reliability determination unit configured to determine whether a learned road link connected to the branch point satisfies a predetermined reliability condition to be serving as a connection road of the branch point, wherein the route guidance unit is further configured to provide the route guidance in (i) the first mode when the exit route determination unit determines that the exit route from the branch point does not correspond to the learned road link and the reliability determination unit determines that the learned road link does not satisfy the reliability condition, and in (ii) the second mode when one of (a) the exit route determination unit determines that the exit route from the branch point corresponds to the learned road link and (b) the reliability determination unit determines that the learned road link fulfills the reliability condition.