Jill Clark Author & Editor

Joseph J. Kerski has been a geographer and cartographer at the National Oceanic and Atmospheric Agency, the U.S. Census Bureau, and the U.S. Geological Survey. He is an education manager for Esri in Denver, Colorado, and is past president of the National Council for Geographic Education.
Jill Clark, a freelance consultant and technical author, has worked in many areas of GIS, including application development and implementation, software development, service provision, and technical writing.