Common power laws for cities and spatial fractal structures

SI Datasets S1 for "Common power laws for cities and spatial
fractal structures" i) cities.zip : This file includes six
CSV files. For each country, there is a corresponding file containing the
population sizes and location information of cities. In each file, there
are four columns: city ID (UA), population size (POP), longitude (LON) and
latitude (LAT) of the the most densely inhabited location in the city
according to the geodetic reference system, WGS1984. ii)
distance_computation.zip : This file includes a manual for the
computation of bilateral distances and travel time among cities, as well
as three associated python codes. iii) distances.zip : This file includes
six CSV files. For each country, there is a corresponding file containing
the shortest bilateral road distance and driving time between each pair of
cities. In each file, there are four columns: origin city ID (ORIG),
destination city ID (DEST), the shortest-path distance in meters
(DISTANCE), and the driving time along the shortest-time path in seconds
(DURATION), where only the cases with ORIG<DEST are contained.