Figure 1
From: Finding disease outbreak locations from human mobility data
Illustration of the inference method. The input is a sample of GPS trajectories of individuals that have visited the outbreak origin (blue circle). The input sample may also include trajectories of other, unaffected individuals (grey, dashed lines). The method aims to infer location and time of the outbreak from GPS data. To this end, the algorithm identifies occurrences when individuals have been in close proximity of each other by searching for local maxima in the spatial distribution of individuals. The most prominent of these maxima is then identified as the estimated outbreak location