Using the guide provided by Flowing Data, with a few modifications for reusability, I’ve generated an SVG map of the United States color coded for school (K-12) density. The original Scalable Vector Graphic map is the public domain FIPS County Code Map for the United States. School locations were compiled from SchoolDataDirect databasesState Education Data Center (Dist.). [2009/11/23]. [School District Locations and Addresses] [State Directories]. Washington, DC: Council of Chief State School Officers. Accessed on [November 23, 2009] from, http://www.SchoolDataDirect.org