Dana Tomlin is a Professor, Adjunct in the School of the Environment and a Professor Emeritus of Landscape Architecture and Regional Planning at the University of Pennsylvania. Dr. Tomlin’s work has long focused on the development and application of geographic information systems (GIS). As designer of the Map Analysis Package GIS, author of GIS and Cartographic Modeling, member of the GIS Hall of Fame, and originator of the Map Algebra language embodied in most of today’s raster-based GIS software, Tomlin is recognized as a leading contributor to this field. He has also been teaching GIS courses at Yale for well over three decades.