Patent ID: 8417453

Claim:
A map information guidance device for installation in a vehicle, the map information guidance device comprising: a data storage unit that stores map information; and a controller configured to: update the map information stored in the map information storage medium, based on map update information distributed from a map distribution center; search for a route to a destination based on the stored map information; perform a first guidance along the route; identify an update target area on the route that will be updated when the map information is updated; prior to the vehicle reaching the update target area, determine whether the update of the update target area will be complete when the vehicle reaches the update target area; and if the update of the update target area will not be complete when the vehicle reaches the update target area: request second guidance for the update target area from the map distribution center; switch from proving the first guidance to providing the second guidance through the update target area; and return to performing the first guidance when the vehicle has exited the update target area.