1. A system for locating a mobile device, the system comprising a computing platform to implement: an input module to access a plurality of scans of wireless network access signaling, the scans indicating received signal measurement results; a similarity measure module to compute comparisons between the data of different scans in order to assess the similarity between those scans, wherein the comparisons produce multi-dimensional comparison results; a dimension reduction module to map the multi-dimensional comparison results to a lower-dimensional space to reduce dimensionality while maintaining similarity properties of the multi-dimensional comparison results, the similarity properties including at least one of distances, variation, or structure, to thereby produce a dimension-reduced set of comparison results; and a clustering module to identify groupings of similar scans based on the dimension-reduced set of comparison results.