A. Jon Kimerling is professor emeritus of geosciences at Oregon State University in Corvallis. He coauthoredElements of Cartography, sixth edition (Wiley, 1995). Aileen R. Buckley is a research cartographer for Esri. Phillip C. Muehrcke is professor emeritus of geography at the University of Wisconsin, Madison. Juliana O. Muehrcke is the founding editor of the journalNonprofit World.