Feature Chen, Q. (2007), "Airborne Lidar Data Processing and Information Extraction," Photogrammetric Engineering and Remote Sensing 73:109–112. Stromberg, J. C., R. Tiller, and B. D. Richter (1996), "Effects of Groundwater Decline on Riparian Vegetation of Semiarid Region: The San Pedro River, Arizona," Ecological Applications 6:113–131. About the Authors Thomas E. Dilts graduated from the University of Alaska, Fairbanks, with a bachelor's degree in geography in 2001 and from the University of Nevada, Reno, with a master's degree in geography in 2007. Currently, he is a GIS analyst/research scientist in the Great Basin Landscape Ecology Lab at the University of Nevada, Reno. Dr. Jian Yang is a postdoctoral researcher at Great Basin Landscape Ecology Lab at the University of Nevada, Reno. He received his bachelor's degree in geography in 1997 and his master's degree in ecology in 2000. In 2005, he received his doctorate in forestry from the Uni- versity of Missouri. His Ph.D. work focused on forest landscape fire and succession modeling. He was the developer of the LANDIS fire module, which has been applied in many ecosystems across the United States (e.g., California, Missouri, and Wisconsin). Dr. Peter J. Weisberg is an associate professor of landscape ecology in the Department of Natural Resources and Environmental Science at the University of Nevada, Reno, and director of the Great Basin Landscape Ecology Lab. He obtained his bachelor's degree in forest biology from the State University of New York (SUNY) College of Environmental Science and Forestry in 1992. He received his master's degree in geography from the University of Wyoming and his doctorate in forest ecology from Oregon State University. His research interests in a landscape ecological framework include treeline change, fire history and forest dynamics, and ecological modeling of ungulate competition and herbivory effects. PE n n Stat E | On l i n E Geospatial Education Portfolio Penn State offers high-quality online education programs to help you achieve your personal and professional goals. Master of Geographic Information Systems Postbaccalaureate Certificate in Geographic Information Systems Postbaccalaureate Certificate in Geospatial Intelligence w w w.worldc ampu s .p su .e du/ar cu ser 09 U.Ed.OUT 10-0151/10-WC-090edc/bjm www.esri.com ArcUser Winter 2010 21