Fig. 2From: The time varying network of urban space uses in Milanα- and β-diversity based on land use distribution in Milan. a Map of α-diversity computed with the Simpson index on the basis of land uses; the darker the NILs’ colors, the higher their α-diversities and, thus, their urban richness. b NILs are colored according to the Euclidean distance between their vector of land-use mix and the one of NIL 1, the city centerBack to article page