Explosive growth in geospatial and temporal data as well as the emergence of new
technologies emphasize the need for automated discovery of spatiotemporal knowledge …

Vehicles equipped with GPS localizers are an important sensory device for examining
people's movements and activities. Taxis equipped with GPS localizers serve the …

The advances in mobile computing and social networking services enable people to probe
the dynamics of a city. In this paper, we address the problem of detecting and describing …

Detecting anomalous trajectory has become an important and fundamental concern in many
real-world applications. However, most of the existing studies 1) cannot handle the …

Trajectories obtained from Global Position System (GPS)-enabled taxis grant us an
opportunity not only to extract meaningful statistics, dynamics, and behaviors about certain …

Urban anomalies may result in loss of life or property if not handled properly. Automatically
alerting anomalies in their early stage or even predicting anomalies before happening is of …

A passenger is overcharged by the taxi driver is one common type of fraudulent trip, and it
brings negative impacts to modern cities. Most existing fraudulent trip detection works rely …

Anomalous taxi trajectories are those chosen by a small number of drivers that are different
from the regular choices of other drivers. These anomalous driving trajectories provide us an …

This paper addresses the taxi fraud problem and introduces a new solution to identify
trajectory outliers. The approach as presented allows to identify both individual and group …

In this paper, we study anomalous trajectory detection, which aims to extract abnormal
movements of vehicles on the roads. This important problem, which facilitates understanding …