Patent ID: 8818707

Claim:
A method of resolving a location from an ordered list of location reference points being representative of nodes in an encoder digital map and each having attributes representative of a specific line or segment in said encoder digital map emanating from or incident at those nodes, comprising the steps of: (i) receiving an ordered list of location reference points being representative of nodes in an encoder digital map and each having attributes representative of a specific line or segment in said encoder digital map emanating from or incident at those nodes, (ii) for each location reference point, identifying at least one candidate node existing in a second digital map, and, using the available attributes of that location reference point, identifying at least one candidate line or segment existing in said second digital map emanating from or incident at said candidate node, (iii) performing a route search within said second digital map between: at least one of said at least one candidate node and the corresponding candidate line or segment emanating therefrom or incident thereat, and at least one of a candidate node for the next location reference point appearing in the list and the corresponding candidate line or segment emanating therefrom or incident thereat, and extracting from said second digital map each line or segment forming part of the route so determined between said candidate nodes, (iv) repeating step (iii) for each consecutive pair of location reference points up to and including the final location reference point appearing in the list.