Analysis of Travel Hot Spots of Taxi Passengers Based on Community Detection

Figure 4

Schematic diagram of three community situations. Note. The blue circle represents the taxi pick-up community, its center is O, and its radius is r_O. The green circle represents the taxi drop-off community, its center is D, and its radius is r_D. The red circle represents the smallest circumscribed circle that contains two communities, its center is C, and its radius is R. In the case of community inclusion, if r_O > r_D, then C is O; otherwise, C is D. The value of R is maximum in r_O and r_D. In the case of community intersection or community separation, the value of C is average of O and D coordinates. If r_O > r_D, then the value of R is the sum of the values of CO (distance value between C and O) and r_O; otherwise, the value of R is the sum of the values of CD (distance value between C and D) and r_O.