From Graphs to Maps
Event date:  July 13, 2015 2:00 PM  to 3:00 PM

Talk Abstract
Relational data sets are often visualized with graphs: objects become the graph vertices and relations become the graph edges. Graph drawing algorithms aim to present such data in an effective and aesthetically appealing way. We describe map representations, which provide a way to visualize relational data with the help of conceptual maps as a data representation metaphor. While graphs often require considerable effort to comprehend, a map representation is more intuitive, as most people are familiar with maps and ways to interact with them via zooming and panning. Map-based visualization allows us to explicitly group clusters of related vertices as "countries" and to present additional information with contour and heatmap overlays. We consider map representations of the DBLP bibliography server. Words and phrases from paper titles are the cities in the map, and countries are created based on word and phrase similarity, calculated using co-occurence. With the help of heatmaps, we can visualize the profile of a particular conference or journal over a base map of all computer science. Similarly, we can create heatmap profiles for individual researchers or research groups such as a department. Alternatively, a specific journal or conference can be used to generate the base map and then a series of heatmap overlays can show the evolution of research topics in the field over the years. As before, individual researchers or research groups can be visualized using heatmap overlays but this time over the journal or conference base map. Finally, visual abstracts can be generated from research papers, providing a snapshot view of the topics in the paper.

See http://mocs.cs.arizona.edu for more details.


 

Speaker’s Bio
Stephen Kobourov is a Professor of Computer Science at the University of Arizona. He completed a BS degree in Mathematics and Computer Science at Dartmouth College in 1995, and a PhD in Computer Science at Johns Hopkins University in 2000.  He worked for a year at the University of Botswana as a Fulbright Scholar and for two years at the University of Tübingen as a Humboldt Fellow. He has also worked as a Research Scientist at AT&T Research Labs.


Event location:  Universität Stuttgart
VISUS
Raum 0.56
Allmandring 19
70569  Stuttgart