Spatiotemporal anomaly detection through visual analysis of geolocated Twitter messages

Authors:
Dennis Thom;Harald Bosch;Steffen Koch;Michael Worner;Thomas Ertl
Affiliations:
Visualization and Interactive Systems Group, University of Stuttgart, Germany;Visualization and Interactive Systems Group, University of Stuttgart, Germany;Visualization and Interactive Systems Group, University of Stuttgart, Germany;Visualization and Interactive Systems Group, University of Stuttgart, Germany;Visualization and Interactive Systems Group, University of Stuttgart, Germany
Venue:
PACIFICVIS '12 Proceedings of the 2012 IEEE Pacific Visualization Symposium
Year:
2012

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Computers and Graphics

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Abstract

Analyzing message streams from social blogging services such as Twitter is a challenging task because of the vast number of documents that are produced daily. At the same time, the availability of geolocated, realtime, and manually created status updates are an invaluable data source for situational awareness scenarios. In this work we present an approach that allows for an interactive analysis of location-based microblog messages in realtime by means of scalable aggregation and geolocated text visualization. For this purpose, we use a novel cluster analysis approach and distinguish between local event reports and global media reaction to detect spatiotemporal anomalies automatically. A workbench allows the scalable visual examination and analysis of messages featuring perspective and semantic layers on a world map representation. Our novel techniques can be used by analysts to classify the presented event candidates and examine them on a global scale.