Patent ID: 8744767
Filing Date: 2014-06-03
Classification: G01C,G08G

Abstract:
1. A section defining method that separates a road between a departure point and a destination point into a plurality of links under a predetermined condition and defines a section based on a link cost, which is an index indicating ease of travel and set for each link, the section being used to generate guide information provided to a driver of a vehicle, the method comprising: defining the section by combining, among the plurality of links between the departure point and the destination point, at least two continuous links that yield a decrease in standard deviation, which is based on sums of the link costs, wherein the section that combines at least two continuous links that yield a decrease in standard deviation, which is based on sums of link costs, is defined as a single section unit; combining at least two continuous links that yield a decrease in standard deviation, which is based on sums of link costs to obtain link combination; and setting the link combination as the single section unit when a standard deviation that is based on the sums of the link costs obtained when the link combination is combined with the next continuous link is greater than the standard deviation corresponding to the link, combination, wherein a plurality of section units are defined by sequentially repeating the combining and the setting from the departure point.