Patent ID: 7110879
Filing Date: 2006-09-19
Classification: G01C

Abstract:
1. A method for making available route data for a navigational device, comprising: dividing up a route from a starting point to a destination requested by the navigational device into a plurality of route segments each including a part of the route; transmitting a first route segment to a navigational unit of the navigational device upon request, the first route segment including a starting field around the starting point, the starting field including a plurality of possible routes and a main route to an intermediate destination on the route to the destination; transmitting a second route segment, before the intermediate destination is reached, to the navigational unit of the navigational device, the second route segment including a plurality of possible routes around the intermediate destination as a starting field and a main route to one of an additional intermediate destination on the route to the destination and the destination; and repeating the second route segment transmitting step for additional route segments for additional intermediate destinations until the destination is reached.