Patent ID: 7945380
Filing Date: 2011-05-17
Classification: G01C,G08G

Abstract:
1. A method for performing a vehicle navigation along a road system using a navigation device, comprising: receiving a destination input from a user of the navigation device; prompting the user to insert a first data medium containing navigation data, including a first map area corresponding to a starting location of a vehicle, into a data-reading arrangement associated with the navigation device, wherein the data-reading arrangement is a data-media drive connected to the navigation device; automatically transferring the navigation data to a memory of the navigation device; after automatically transferring the navigation data to the memory, determining, at the navigation device, that the first data medium does not contain navigation data needed to reach the destination; responsive to the determining, prompting the user to replace the first data medium with a second data medium containing the needed navigation data, including a second map area corresponding to the destination, wherein the second data medium does not contain data corresponding to the first map area; after the first data medium is replaced with the second data medium, automatically transferring additional navigation data from the second data medium to the memory; at the navigation device, responsive to the transferring of the additional navigation data, calculating a trip route from the first map area to the second map area, using the automatically transferred navigation data to calculate a portion of the trip route along the first map area, and using the additional navigation data to calculate a portion of the trip route along the second map area; and outputting navigation instructions to the user based on the calculated trip route.