However, in the case where the microcomputer 402 has such a function as voice synthesizing and so on, a route guiding to the user by a human voice is also made possible. [0150] Seventh Embodiment [0151] Further, the first embodiment has been explained as to the case where a so-called turn-by-turn method for displaying images as shown in FIG. 7(j) and 7(k) is explained as the method for providing a