Patent ID: 7233862

Claim:
An information center comprising: a communicator which performs transmission/reception of data to and from a terminal which moves along a route; a route information calculator which creates route information by calculating an optimum route from position information on a starting place and a destination place received at said communicator; and a guiding point information calculator which creates guiding point information by making reference to said calculated route so as to extract a guiding point at which an advancing course is to be modified, wherein said guiding point information calculator generates the guiding point information indicating a driving direction at the guiding point on the optimum route for guiding, wherein said guiding point information calculator judges a degree of complexity of an intersection at the guiding point based on types of roads constituting the intersection and selects for the guiding point a guiding-mode type including a mode where the intersection point is displayed in an enlarged view or a mode where an arrow is displayed in accordance with the judged degree of complexity, wherein, when said guiding point information calculator judges, for each guiding point on an optimum route, the degree of complexity of the intersection and selects for the guiding point the guiding-mode type corresponding to the mode where the intersection point is displayed in an enlarged-view, said guiding point information calculator creates a guiding point map of a predetermined area around the guiding point on which the driving direction is superposed, and wherein said communicator transmits the guiding point map with the route information and the guiding point information to the terminal.