Page 11 Spring 2009 · Vol. 12 No. 2 FOCUS 16 The Next Step The importance of building geospatial infrastructures 18 A Geospatial Foundation Public, private, and military applications flow from SDI 22 Improving Regional Water Quality Assessment Geodatabase improves data management and analysis capabilities FEATURES 24 It's All about Context Remapping mammoth bone bed with ArcGIS 28 Modeling Small Areas Is a Big Challenge Using the solar radiation analysis tools in ArcGIS Spatial Analyst SPECIAL SECTION 40 Answering Why Questions An introduction to using regression analysis with spatial data 40 Regression Analysis Components Terms and basic concepts 44 Applying Geographically Weighted Regression to a Real Estate Problem An example from Marquette, Michigan 115206 QUAD382M3/09tj www.esri.com ArcUser Spring 2009 3