User Guide
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User Manual:
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User Guide of T-Drive Data
Version 1.0
Updated on August 12, 2011
1 Data Description
This dataset contains the GPS trajectories of 10,357 taxis during the period of Feb. 2 to Feb. 8, 2008
within Beijing. The total number of points in this dataset is about 15 million and the total distance of
the trajectories reaches to 9 million kilometers. Fig. 1 plots the distribution of time interval and distance
interval between two consecutive points. The average sampling interval is about 177 seconds with a distance
of about 623 meters. Each file of this dataset, which is named by the taxi ID, contains the trajectories of
one taxi. Fig. 2 visualized the density distribution of the GPS points in this dataset.
0 2 4 6 8 10 12
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
minutes
proportion
(a) time interval
0 1000 2000 3000 4000 5000 6000 7000 8000
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
meters
proportion
(b) distance interval
Figure 1: Histograms of time interval and distance between two consecutive points
116.1 116.2 116.3 116.4 116.5 116.6 116.7 116.8
39.6
39.7
39.8
39.9
40
40.1
40.2
10
50
300
1,800
11,700
76,200
(a) Data overview in Beijing
116.2 116.25 116.3 116.35 116.4 116.45 116.5 116.55
39.8
39.85
39.9
39.95
40
40.05
10
50
300
1,800
11,700
76,200
(b) Within the 5th Ring Road of Beijing
Figure 2: Distribution of GPS points, where the color indicates the density of the points
2 Data Format
Here is a piece of sample in a file:
1
1,2008-02-02 15:36:08,116.51172,39.92123
1,2008-02-02 15:46:08,116.51135,39.93883
1,2008-02-02 15:46:08,116.51135,39.93883
1,2008-02-02 15:56:08,116.51627,39.91034
1,2008-02-02 16:06:08,116.47186,39.91248
1,2008-02-02 16:16:08,116.47217,39.92498
1,2008-02-02 16:26:08,116.47179,39.90718
1,2008-02-02 16:36:08,116.45617,39.90531
1,2008-02-02 17:00:24,116.47191,39.90577
1,2008-02-02 17:10:24,116.50661,39.9145
1,2008-02-02 20:30:34,116.49625,39.9146
Each line of a file has the following fields, separated by comma:
taxi id, date time, longitude, latitude
3 Contact
Yu Zheng
Tel: 86-10-59173038 Email: yuzheng@microsoft.com
Homepage: http://research.microsoft.com/en-us/people/yuzheng/default.aspx
Address: Microsoft Research Asia, Tower 2, No. 5 Danling Street, Haidian District, Beijing, P.R. China
100080
4 Paper Citation
Please cite the following papers when using the dataset:
[1] Jing Yuan, Yu Zheng, Xing Xie, and Guangzhong Sun. Driving with knowledge from the physical world.
In The 17th ACM SIGKDD international conference on Knowledge Discovery and Data mining, KDD
’11, New York, NY, USA, 2011. ACM.
[2] Jing Yuan, Yu Zheng, Chengyang Zhang, Wenlei Xie, Xing Xie, Guangzhong Sun, and Yan Huang. T-
drive: driving directions based on taxi trajectories. In Proceedings of the 18th SIGSPATIAL International
Conference on Advances in Geographic Information Systems, GIS ’10, pages 99–108, New York, NY, USA,
2010. ACM.
5 Microsoft Research License Agreement
T-Drive Taxi Trajectories
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