Figure 1.

Example of anonymized points that have been averaged. An original data point (red) was anonymized using a population-density adjusted Gaussian skew algorithm five times (light blue points). Those points were averaged and the average coordinate value is plotted (green). The average of the anonymized points is nearer to the original point than each of the anonymized points.

Cassa et al. International Journal of Health Geographics 2008 7:45   doi:10.1186/1476-072X-7-45
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