Alan M. MacEachren is a Professor of Geography at the Pennsylvania State University. His Research and Teaching Interests include: Cartography; Visualization (Chair of ICA Commission on Visualization); Geographic Information Analysis (Director of the GeoVISTA Center); Geographic Information Systems; Environmental Cognition; and The APOALA Project. Much of his work deals with dynamic forms of representation. These forms include interactive environments for exploring multivariate geospatial data, map animation as a method for understanding geographic processes (and other ordered information), and the integration of interactivity and animation. Applications areas focused on in his visualization research have included epidemiological analysis, Earth Science education, implications of global environmental change, and uncertainty in health and environmental data and in meteorological and climatological model results. His most recent research foci include integration of geographic visualization with knowledge discovery in database methods, collaborative visualization, and design of GeoVirtual environments.