Figure 3
From: From mobile phone data to the spatial structure of cities
Map of the metropolitan area of Barcelona.
The white area represents the metropolitan area (administrative delimitation), the brown area represents territories surrounding the metropolitan area and the blue area the sea. (a) Voronoi cells of the mobile phone antennas point pattern. (b) Intersection between the Voronoi cells and the metropolitan area. (c) Grid composed of 1 km2 square cells on which we aggregated the number/density of unique phone users associated to each phone antenna (NB: these maps were created with R standard packages for handling spatial data and freely available layers).
