This document summarizes a presentation given by researchers from the Kirwan Institute for the Study of Race & Ethnicity to the Jessie Ball duPont Foundation on using maps and GIS to seize opportunities and confront challenges. It provides background on the Kirwan Institute and their work focusing on opportunity mapping. It then discusses two case studies where opportunity mapping was used - in Baltimore, MD to address fair housing issues and in Massachusetts to examine legal services for populations and neighborhoods. The presentation concludes by exploring potential local applications in Duval County, Florida.