University of Konstanz
Graduiertenkolleg / PhD Program
Computer and Information Science

Graduation Talks


Overlap-Reduction Techniques for Visualizations of Geospatial Data


Halldór Janetzko, University Konstanz
Konstanz, Germany

date & place

Wednesday, 09.05.2012, 15:15 h
Room C252


Growing amounts of geospatial movement data increase the need for analysis techniques dealing with those data sets. Typical tasks include not only to visualize the movement data itself, but also to help the analyst to under- stand movement behavior. In the application scenario of ecological biology, stakeholders are for instance interested in changes of the movement behavior caused by man-made impacts to habitats. Consequently, external data sources (e.g., precipitation, wind direction, etc.) can significantly enrich the analysis process. Besides the challenges in detect- ing interdependencies between those variables, visualizing both the original movement trajectories and the detected patterns simultaneously is an interesting research problem. One problem inherent to visualizing trajectory data is the overplotting of visual representatives, like points or lines. We propose techniques to reduce the amount of overplot- ting or in the case of point-based representations even avoid overplotting at all.