Apparatus and method for navigating mobile body using road map displayed in form of bird's eye view

摘要

In apparatus and method for navigating a mobile body such as an automotive vehicle along a set route of travel, a road map stored in an external large-capacity memory unit such as a CD-ROM on a two- dimensional plane is graphically drawn on a display frame of an image screen with a degree of particulars of the road map data varied according to a displayed position of the image screen with respect to the display frame so that the graphically drawn road map in a form of a bird's eye view is viewed three-dimensionally with a feeling of depth given to a viewer. In an embodiment, as the displayed position of the image screen becomes upper with respect to the display frame, the degree of the particulars becomes lower.