Extracting the Complete Travel Trajectory of Subway Passengers Based on Mobile Phone Data

Table 1

Data tags of mobile phone 4G signaling data.

Number	Data Tag	Data type	Description
1	mdn	string	user unique code
2	start_time	string	data generation time
3	end_time	string	none
4	lat	string	base station latitude
5	lon	string	base station longitude
6	cell_id	string	base station code
7	lac	string	location code
8	city_id	string	city number
9	clndr_dt_id	int	date