John Krygier, PhD, is Professor in the Department of Environment and Sustainability at Ohio Wesleyan University, with teaching and research specializations in cartography, geographic information systems (GIS), and environmental and human geography. He has made lots of maps and published on map design, educational technology, cultural geography, multimedia in cartography, planning, the history of cartography, and participatory GIS.

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Denis Wood, PhD, is an independent scholar living in Raleigh, North Carolina. He curated the award-winning Power of Maps exhibition for the Smithsonian and writes widely about maps. He is a former professor of design at North Carolina State University.

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• All titles by Denis Wood