Patent ID: 7031834

Claim:
A navigation system comprising: position determination units that have a first position determination unit determining a position as a first position and a second position determination unit determining the position as a second position accurately than the first position determination unit; maps that have a first map and a second map that is more detail than the first map; a display that displays one of the first position determined by the first position determination unit and the second position determined by the second position determination unit on one of the first map and the second map; and a controller that controls a relation between the position determination units and the maps to display one of the first position and the second position on one of the maps in the display, wherein the controller selects one of the maps to display the position determined by one of the position determination units based on which position determination unit is used to determine the position, and wherein the controller prohibits using the first map to display the second position determined by the second position determination unit when the second position determination unit is used to determine the position.