Patent ID: 9470534
Filing Date: 2016-10-18
CPC Classification: G01C,G06K

Claim Text:
1. A method of determining a deviation in the course of a navigable stretch of a network of navigable segments in an area represented by an electronic map, the electronic map comprising a plurality of segments representing the navigable segments in the area covered by the electronic map, wherein the navigable stretch is represented by at least a portion of one or more segments of the electronic map, the method comprising: obtaining, by at least one processor, positional data relating to the movement of a plurality of devices along the navigable stretch, said positional data comprising a plurality of positions; determining, by the at least one processor, a map matching error for a plurality of positions of the positional data, the map matching error being indicative of a difference between the position of the positional data and a position on a segment of the electronic map to which the position is matched; using, by the at least one processor, data indicative of the determined map matching error for the plurality of positions along the navigable stretch to determine a deviation indicative of a lateral offset in the course of at least a portion of the navigable stretch as indicated by a longitudinal reference line associated with the respective one or more segments of the electronic map; and generating, by the at least one processor, data indicative of the determined deviation.