User Guide

user_guide

user_guide

user_guide

User Manual:

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User Guide of T-Drive Data
Version 1.0
Updated on August 12, 2011

1

Data Description

0.35

0.7

0.3

0.6

0.25

0.5
proportion

proportion

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.

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0.1

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0.1

0

0

2

4

6
minutes

8

10

0

12

0

1000

(a) time interval

2000

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4000
meters

5000

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7000

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(b) distance interval

Figure 1: Histograms of time interval and distance between two consecutive points

76,200

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76,200
40.05

40.1

11,700

11,700
40

40

1,800

1,800
39.95

39.9
300

300
39.9

39.8
50

50
39.85

39.7
10

10
39.8

39.6

116.1

116.2

116.3

116.4

116.5

116.6

116.7

116.8

116.2

(a) Data overview in Beijing

116.25

116.3

116.35

116.4

116.45

116.5

116.55

(b) Within the 5th Ring Road of Beijing

Figure 2: Distribution of GPS points, where the color indicates the density of the points

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Data Format

Here is a piece of sample in a file:
1

1,2008-02-02
1,2008-02-02
1,2008-02-02
1,2008-02-02
1,2008-02-02
1,2008-02-02
1,2008-02-02
1,2008-02-02
1,2008-02-02
1,2008-02-02
1,2008-02-02

15:36:08,116.51172,39.92123
15:46:08,116.51135,39.93883
15:46:08,116.51135,39.93883
15:56:08,116.51627,39.91034
16:06:08,116.47186,39.91248
16:16:08,116.47217,39.92498
16:26:08,116.47179,39.90718
16:36:08,116.45617,39.90531
17:00:24,116.47191,39.90577
17:10:24,116.50661,39.9145
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. Tdrive: 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
This Microsoft Research License Agreement, including all exhibits (”MSR-LA”) is a legal agreement
between you and Microsoft Corporation (Microsoft or we) for the software or data identified above, which
may include source code, and any associated materials, text or speech files, associated media and “online”
or electronic documentation and any updates we provide in our discretion (together, the ”Software”).
By installing, copying, or otherwise using this Software, you agree to be bound by the terms of this MSRLA. If you do not agree, do not install copy or use the Software. The Software is protected by copyright and
other intellectual property laws and is licensed, not sold. SCOPE OF RIGHTS:
You may use this Software for any non-commercial purpose, subject to the restrictions in this MSR-LA.
Some purposes which can be non-commercial are teaching, academic research, public demonstrations and
personal experimentation. You may not distribute this Software or any derivative works in any form. In
return, we simply require that you agree:
1. That you will not remove any copyright or other notices from the Software.
2. That if any of the Software is in binary format, you will not attempt to modify such portions of the
Software, or to reverse engineer or decompile them, except and only to the extent authorized by applicable
law.

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Copyright (c) Microsoft Corporation. All rights reserved.

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