Patent ID: 6771189
Filing Date: 2004-08-03
Classification: G01C,G08G

Abstract:
A display method for a navigation system, comprising the following steps of:displaying a guidance map for guiding a user to a destination by indicating a maneuver point on the route and a direction of turn at the maneuver point; detecting a plurality of maneuver points in succession on the route to the destination and applying a test condition to the maneuver points based on geometry of the maneuver points; adjusting a number of maneuver points to be displayed on the guidance map as a result of applying the test condition to the maneuver points; and enlarging a size of the guidance map while including the adjusted number of maneuver points in the guidance map; wherein said test condition includes a test condition (1) which determines L(n, n+1&lE;Lmax, where L(n, n+1) is a drive length along a street between two adjacent maneuver points Pn and Pn+1, and Lmax is a maximum allowable drive length of the a street between the two adjacent maneuver points and a test condition (2) which determines L(n, n+1)&lE;KDD(1, 2), where D(1, 2) is a straight-line length between a first maneuver point P1 and a second maneuver point P2, and Kn is a relative factor for determining maximum allowable straight-line maneuvers.