| 摘要 |
Time-tagged coordinates from session-unique transmissions of wireless devices are collected routinely and stored for later analysis. From this data, one may derive a sequence of wireless device operation from which attributes may be ascertained. Sequences are accumulated until a dense aggregate pattern ( 900 ) is formed over a geographic area. Aggregate data is sorted into ranges representing speed of movement and then converted to pixels representing cells ( 401 ) in an aggregate matrix ( 400 ). Heavily weighted values ( 402 ) are assigned to cells ( 401 ) that represent a location within a pre-specified spatial error ( 100 ) about a data point ( 101 ). Lower values are assigned to cells ( 401 ) representing paths ( 200 ), or corridors, connecting these better-identified locations. As more transmission sessions ( 500 ) are added to the matrix ( 400 ), the largest weight values ( 402 ) cluster as individual cells ( 401 ) representing a most likely path ( 1001 ). Thus precise topographic attributes may be derived based on these spatial clusters (FIG. 11 A), overlapping paths connecting them ( 1001 ), or combinations (FIG. 15 A) thereof.
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