September 5, Friday, Keynote

Visual Summaries of Geographic Databases

Robert Laurini
Distinguished professor of the Computing Department and the LIRIS Laboratory
at the National Institute for Applied Sciences (INSA-Lyon)


For several applications, it is interesting to have an idea of database contents. For instance in geo-marketing, a decision-maker could be interested in knowing the places where his products are not well sold. In other words, the summary of a database must include only the important items.

The goal of this paper will be to present an international project aiming at generating visual summaries of geographic databases based on chorems. From years, chorems as schematized representations of territories invented by a geographer named Brunet are used to represent the more salient aspects of a territory. But in this methodology, the designer is supposed to know everything and to propose a schema. In contrast, in our project, the starting point is a geographic database representing information over a territory for which one wants to generate a drawing emphasizing only the salient aspects called patterns. So, two main problems exist, first to extract the salient patterns from spatial data mining, and the second visualizing the results after having done both a geometric generalization of the territory boundaries, and a semantic generalization of the contents.

This paper will first present the problems of discovering patterns and selecting the more important ones (5 2). Then, we will explain how to make the geometric and semantic generalizations. After having presented a model of patterns, we will present the ChorML language used for both for storing and visualizing them.

LAURINI R., MILLERET-RAFFORT F., LOPEZ K. (2006) "A Primer of Geographic Databases Based on Chorems". In proceedings of the SebGIS Conference, Montpellier, Published by Springer Verlag LNCS 4278, pp. 1693-1702.

DEL FATTO V., LAURINI R., LOPEZ K., LORETO R., MILLERET-RAFFORT F., SEBILLO M., SOL-MARTINEZ D., VITIELLO G. (2007) "Potentialities of Chorems as Visual Summaries of Spatial Databases Contents", VISUAL 2007, 9th International Conference on Visual Information Systems, Shanghai, China, 28-29 June 2007. Edited by Qiu, G., Leung, C., Xue, X.-Y., Laurini, R., Springer Verlag LNCS, Volume 4781 "Advances in Visual Information Systems", pp. 537-548.

DEL FATTO V., LAURINI R., LOPEZ K., SEBILLO M. TORTORA G., TUCCI M., VITIELLO G. (2007) " Chorem Editing - Visual Summary of Spatial Database Content". In Proceedings of the 13th "International Conference on Distributed Multimedia Systems - Workshop on Visual Languages and Computing (VLC2007)" San Francisco USA, 6-8 Sept. 2007, pp.256-259.

Biographical Sketch

Born in 1947, Prof. Robert LAURINI is full distinguished professor at the National Institute for Applied Sciences (INSA-Lyon), and more precisely at the Computing Department and at the LIRIS Laboratory. He speaks fluently French, English, Italian and Spanish.

Previously, he carried out researches at the University of Cambridge, UK (1976-1977) and at the University of Maryland, USA (1986-1987). During five years, he was head of the Laboratory for Information System Engineering (LISI), shared by to the National Institute for Applied Sciences (INSA) and Claude Bernard University of Lyon, France. Until recently, he was deputy head of the LIRIS Research Center for Images and Information Systems from January 2003 to December 2006.

He is also member of ACM and of IEEE Computer Society. In November 1998, he received an ACM award for Technical Contributions and Leadership. He is also: His main interests are spatial and visual information systems with applications to urban and environmental planning. He has written more than 200 scientific peer-reviewed papers, and tutored 40 PhD's.

He has co-authored 5 books, out of which the more important "Fundamentals of Spatial Information Systems" co-authored with D. Thompson. The last book entitled "Information Systems for Urban Planning, A Hypermedia Cooperative Approach" was issued in February 2001.

He also teaches at the University of Venice (IUAV), Italy.