Recognition of Functional Areas Based on Call Detail Records and Point of Interest Data

Table 1

CDR data format and examples.

Field name	Description	Examples
IMSI	Unique identification of a cell phone, also the user ID	15756
Time	Time of the successful signaling trigger, exact to the second	2015/06/1 1 : 05 : 00
LAC	ID number of position area	4128
E	Longitude	116.327407
N	Latitude	39.887484
Event ID	Event type	8
	8: calling or called
	9: position update
	10: sending and receiving SMS
Type	Type of base station	0
	0: macrocellular station
	1: microcellular station