Geographic information systems are powerful mapping tools that we use on a daily basis without realizing it. Apps for navigation and weather are just a few examples of GIS in our everyday lives. But the applications of GIS span far beyond consumer apps. These complex systems hold massive amounts of data that scientists can use to solve big problems. In this episode, you'll hear how Oak Ridge National Laboratory has used its expertise in GIS to aid in disaster relief; find missing populations for a polio eradication campaign; and map communities using social media.