University of Konstanz
Graduiertenkolleg / PhD Program
Computer and Information Science

Graduation Talks

title

Visual Analytics for Movement Data

speaker

David Spretke, University Konstanz
Konstanz, Germany

date & place

Wednesday, 26.06.2013, 13:00 h
Room G 309

abstract

The analysis of trajectories has become an im- portant eld in geographic visualization since cheap GPS sensors have become commonplace and, in many cases, valu- able information can be derived either from the data them- selves or their metadata if processed and visualized in the right way. However, showing the \right" information to highlight dependencies between di erent measurements re- mains a challenge, because the technical intricacies of ap- plying a combination of automatic and visual analysis meth- ods prevents the majority of domain experts from analyz- ing and exploring the full wealth of their movement data. We present an exploration through enrichment approach, which enables iterative generation of metadata based on exploratory ndings and is aimed at enabling domain ex- perts to explore their data beyond traditional means. In particular, the applicability of the proposed approach is demonstrated through a interactive computational visual analytics system that allows for generation of previously unexplored hypotheses and continuous enrichment of the movement data to verify these hypotheses. In addition to visualization components and interaction features, the sys- tem includes data enrichment capabilities. Such capabilities are the derivation of new attributes by using a formal editor or the semantic annotation of trajectories by combining a semi-automatic segmentation and context-based clustering approach.