1. An apparatus, comprising: at least one processor; and at least one memory including computer program code, the memory and the computer program code configured to, working with the processor, cause the apparatus to perform at least the following: receive probe data indicative of a set of navigational signal measurements that is matched to a link segment; determine a set of measurement errors such that each measurement error of the set of measurement errors is a difference between a location indicated by the link segment and a location indicated by a navigational signal measurement of the set of navigational signal measurements; determine at least one statistical attribute of the set of measurement errors; store an indication of the statistical attribute in map information associated with the link segment; and use the statistical attribute associated with the link segment as an input to compensate for errors in the navigational signal measurements to facilitate at least one of autonomous vehicle navigation or route guidance.