A database stores map data including road network data and landmark data. A route
search unit searches for a route from a departure point to a destination point
from the road network data stored in said database. A road pattern analysis unit
analyzes a road pattern of the route by referring to the road network data, and
obtains road pattern data as the analysis result. A route guidance information
generation unit generates route guidance information of the route using the road
pattern data and the landmark data along the route. A presentation unit presents
the route guidance information.
