Patent ID: 9697426
Date: 2017-07-04
CPC Classifications: G01C,G06K,G09B

Claim:
1. A method of encoding a continuous path within a road network, said path being completely represented within a digital map and expressible as a path list of lines and/or segments existing in said digital map and consecutively ordered, wherein said lines and/or segments have one or more attributes associated therewith including a functional road class (FRC), said method comprising the steps of: determining a lowest functional road class (LFRC) for the lines and/or segments forming at least a portion of the continuous path to be encoded; storing a start position in a route search list; determining a path from the start position to an end position as indicated by the last line or segment in the path list within said digital map, said path being determined according to an algorithm, said algorithm using the determined LFRC to provide a threshold, and to not consider those lines and/or segments for inclusion in the path being determined that have a lower FRC attribute than the threshold; encoding the continuous path using the determined path; and storing the encoded continuous path.