Figure 4
From: Probing crowd density through smartphones in city-scale mass gatherings
Heat map of user distribution. Map of the data recording zone. Superimposed is a heat map representation of the distribution of all recorded location updates. The ‘hotter’ an area is colored (i.e. the more yellow it is), the more data points have been colected in this area. It is visible that more data has been collected around locations where event-related activities took place.