Target inputting and representing method for use on display device of navigation system, involves representing target assigned to geographical position, and differentiating symbols of target of special category from another symbol

摘要

The method involves inputting a target, assigning the target to a geographic position, and assigning the geographical position to a special category. A geographical map is displayed, the target is assigned to the special category, and the target assigned to the geographical position is represented based on symbols (7). The symbols of the target of the special category are differentiated from another symbol (3) of another target. The symbols of different types are represented in the geographical map.