David W. S. WongDavid W. S. Wong, PhD, is Professor in the Department of Geography and Geoinformation Science at George Mason University. Formerly, he was Professor in the Department of Geography at the University of Hong Kong. His primary thematic research interests are in population and health geographies. His primary technical interests include spatial analysis statistical methods and geovisualization. He has published extensively in measuring spatial segregation, with recent research focusing on uncertainty in spatial data. Dr. Wong has served on the editorial boards of journals including Computers, Environment, and Urban Systems; Demography; and Geographical Analysis.