1. A method of flagging survey data, the method comprising: receiving, from a plurality of client devices, time-indexed logs recorded while each client device was moved through an indoor space, wherein the indoor space is the same for each time-indexed log; identifying a map of the indoor space; for each of the received time-indexed logs, identifying an associated path through the indoor space; selecting one of the received time-indexed logs; determining, by a processor, a consistency score for the selected time-indexed log based on the selected time-indexed log and one or more other of the received time-indexed logs and the identified map of the indoor space; and flagging, for further review, a portion of the path associated with the selected time-indexed log based on the consistency score.