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Figure 9 | EPJ Data Science

Figure 9

From: Probing crowd density through smartphones in city-scale mass gatherings

Figure 9

Histogram of density-speed tuples. Histogram of the density-velocity relation of our data set the kernel radii (a)R=10 m and (b)R=55 m, respectively. The plots depict a two-dimensional histogram of all obtained density-velocity tuples (logarithmic scale). The color values indicate the occurrence frequency of a tuple. It is observable that the walking velocity covers the whole range from 0  ms 1 up to a maximal value for a given density. This upper limit is depends on the crowd density and decays for larger crowd densities.

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