Table 1 The statistical information of the six cities.

BostonLANYCDohaDubaiRiyadh
No. of facilities [×1000]66.3319.8207.512.938.764.0
Population [million]2.369.598.120.992.915.17
Area [km2]16493869113230914021091
Nocc11253696947217657847
Nmax19475505135738016351305
UCI0.210.170.190.240.350.26
DoccHospital0.110.130.270.270.200.33
School0.320.330.740.370.180.29
Supermarket0.060.080.380.130.120.14
Park0.420.450.740.220.170.26
Pharmacy0.230.300.670.220.240.37
Bank0.370.350.670.420.330.47
Fire station0.130.090.320.030.020.01
Concert hall0.050.070.140.050.030.07
Soccer field0.080.040.110.140.070.10
Bar0.300.260.660.180.150.19