1. A method for determining geographic coordinates of nodes in a communications network, the method comprising: determining geographic coordinates of at least a subset of a plurality of anchor nodes in part based on an estimated distance between at least two anchor nodes in the subset, the estimated distance being based on raw distances determined of the at least two anchor nodes from at least one non-anchor node located in a range of, and in communication with, the at least two anchor nodes; and locating a geographical position of the at least one non-anchor node in part based on the geographic coordinates determined of the at least two anchor nodes.