Patent ID: 9068853
Filing Date: 2015-06-30
Classification: G01C,G09B

Abstract:
1. A method, comprising: retrieving, by a processor of a navigation system, geographic map data from a database, where the geographic map data includes at least two polygonal chains, where each of the at least two polygonal chains includes segments; determining, by the processor, a straightness value for each of the at least two polygonal chains; determining, by the processor, a first class and a second class of the at least two polygonal chains based on the straightness value for each of the at least two polygonal chains, the first class including a lower range of straightness values than that of the second class; determining, by the processor, a route to a destination based on the determined class of the first class and the second class of the at least two polygonal chains; and displaying the determined route on a display of the navigation system.