Professor of Geography, Department of Geography, San Diego State University USA. Ph.D., University of Washington, 1989. M.S., Poznan University of Economics, 1979. Research Interests: Spatial Decision Support Systems, Public Participation GIS, Visual Analytics, Geocomputation Methods, Volunteered Geographic Information, Water Resource Modeling and Management. Courses Taught: Introduction to Geographic Information Systems, Spatial Decision Support Methods, Geographic Information Systems: Methods and Applications, Advanced Geographic Information Systems and Participatory Geographic Information Systems.