Geography Reference
In-Depth Information
Figure 10. Visualizing the dynamic phone-call ―source‖ areas (red), ―sink‖ areas (blue)
and ―zero-balance‖ areas (yellow) in 3D-GIS environment.
By comparing the phone call volume of each cell with its 1
st
-order
adjacent neighbors, there are four types of associations identified: (1) HH:
observations in both the target cell and neighbors are high; (2) HL: high call
volume in the target cell with low volume in neighbors; (3) LH: low call
volume in the target cell with high volume in neighbors; (4) LL: the call
volume in both the target cell and neighbors are low. Figure 12a illustrates the
results of significant Moran's I LISA in the period 3AM~6AM.
