Using Java, Pritt developed a computer algorithm that can figure out where a photograph was taken by looking at the horizon. In this video he speaks specifically about the algorithm’s potential usage for Community Remote Sensing, a form of environmental citizen science where nonscientists collect data, here through photographs, to help monitor air, wildlife and other environmental concerns at the local level - something that is impossible with larger-scale observations like those made by satellites. The program can be used for purposes ranging from counter-terrorism to disaster relief.