To prevent erasure of valuable personal information such as a memory spot, learning information and the like stored in a memory means.
The navigation apparatus for searching a route based on a spot input of a destination or the like and guiding the searched route comprises a first memory means 41 storing important information in non-volatile manner, a rewritable second memory means 43 for learning information such as a correcting accuracy of a sensor or an arbitrary spot and temporarily storing registration information, and leaning information, data checking means 40, 42 for checking stored contents of the means 41, 43, and control means 40, 42 for rewritably controlling the information stored in the means 41, 43 based on decided results of the means 40, 42.
KATO SHINICHI
HIYOKAWA TOYOJI
OZAKI NAOKAZU
MATSUBA JUNZO
