1. A method comprising: receiving optical data collected along a path by a collection device; identifying one or more false positive locations associated with the path; identifying a potential position from the optical data; comparing the potential position to the one or more false positive locations; and analyzing the optical data based on the one or more false positive locations to identify the potential position as a confirmed position in response to a distance between the potential position and at least one of the one or more false positive locations exceeding a threshold distance.