COSIT'11 Chairs Conference General Chairs Nicholas Giudice and Mike Worboys Conference Program Chair Max Egenhofer and Reinhardt Moratz Workshop Chair Alexander Klippel Doctoral Colloquium Chair Angela Schwering and Christian Kray       COSIT'11 Program Committee Pragya Agarwal Brandon Bennett Moulin Bernard Sven Bertel Michela Bertolotto Mehul Bhatt Thomas Bittner Gilberto Camara Christophe Claramunt Eliseo Clementini Helen Couclelis Leila De Floriani Matt Duckham Geoffrey Edwards Carola Eschenbach Sara Fabrikant Andrew Frank Christian Freksa Mark Gahegan Antony Galton Stephen Hirtle Christopher Jones Marinos Kavouras Alexander Klippel Christian Kray Barry Kronenfeld Werner Kuhn Lars Kulik Damir Medak Daniel R. Montello Nora Newcombe Martin Raubal Jochen Renz Kai-Florian Richter Andrea Rodriguez Christoph Schlieder Angela Schwering John Stell Kathleen Stewart Hornsby Sabine Timpf Barbara Tversky David Uttal Nico Van De Weghe Jan Oliver Wallgrün Robert Weibel Stephan Winter Thomas Wolbers Diedrich Wolter May Yuan