Alan MacEachren is the E. Willard and Ruby S. Miller Professor at Penn State University and the Director of the GeoVista Center. He is an Honorary Fellow of the International Cartographic Association. MacEachren has played a central role nationally and internationally in defining the research agenda for human-centered geovisualization and in building cross-disciplinary links to related efforts in scientific and information visualization and exploratory data analysis in statistics. He is the director of the DHS North-East Regional Visualization and Analytics Center. He is chair of the International Cartographic Association Commission on Visualization and Virtual Reality. MacEachren wrote the important and widely used book, How Maps Work: Representation, Visualization, and Design, which has been hailed as mandatory reading for all those interested in the role of maps in the new information era.