Getting Answers Quickly Hydrologic analysis and 3D GIS improve flood response By Vinu Chandran, Seth Agyepong, and Tim Scharff, Cobb County GIS A map of Cobb County showing flooded creeks, stream gauges, watershed boundaries, and flooded parcels A flowchart showing the data processing steps in flood analysis 26 ArcUser Spring 2010 www.esri.com