1. A method of determining the location of a mobile device in a communications network comprising the steps of: (a) generating a first set of network measurement reports (NMR) for a region in a communications network; (b) clustering measurement information from the first set of NMRs as a function of a common parameter of the measurement information; (c) receiving a candidate NMR for a mobile device; (d) comparing measurement information from the candidate NMR with the clustered measurement information from the first set of NMRs; and (e) determining a location of the mobile device as a function of the compared measurement information.