Software and Data not every block review was straightforward. This example demonstrates the difficulties encountered when the block boundaries and satellite images were not cleanly aligned. About the Authors Douglas A. Skuta joined Esri in 2000 and has more than 10 years of analytic experience in statistical programming and econometric methods. He contributes to the development and updating of Esri's demographic databases and consumer segmentation systems and also works on custom site selection and profiling projects for Esri's retail and real estate clients. Prior to joining Esri, he served as an economist in the branch of Development and Applications Research for the Current Employment Statistics Survey at the U.S. Bureau of Labor Statistics in Washington, D.C. Skuta holds a bachelor of arts degree in economics from Hillsdale College in Hillsdale, Michigan, and a master's degree in economics from Ohio University in Athens, Ohio. Jim Herries is a geographer with 15 years' experience defining and delivering solutions involving GIS and demographic data. As a product engineer on the cartography team at Esri, he supports multiple teams seeking to put information about people, housing, and businesses into their services, products, and solutions. Herries earned his master's degree in geography from Ohio State University in Columbus, Ohio, and his bachelor's degree in journalism from Lindenwood College in St. Charles, Missouri. Earl A. Nordstrand joined Esri in 1988 and has more than 30 years of analytic experience in geography and GIS. Currently managing the Business Analyst product team, he has also managed Esri data products, worked in the technical marketing of ArcGIS software, and developed custom GIS solutions. Prior to joining Esri, he managed the North Slope Borough GIS, was research director for the Minnesota Land Management Information www.esri.com This block has limited population growth potential. Block boundaries were not always defined in a manner that represented the distribution of the population. Center, and was the director of information systems for the Arrowhead Regional Development Commission. Nordstrand holds a bachelor of science degree in geography from the University of Minnesota, Duluth, and a master's degree in geography from the University of Minnesota. ArcUser Fall 2010 17