Social and community intelligence research aims to reveal individual and group behaviors, social interactions, and community dynamics by mining the digital traces that people leave while interacting with Web applications, static infrastructure, and mobile and wearable devices. The past decade has seen a phenomenal growth of Internet and social network services, an explosion of sensor-equipped mobile phones, broader use of the Global Positioning System (GPS) in all types of public transportation, and the extensive deployment of sensor networks in facilities and outdoor environments. All these developments have led to an unprecedented accumulation of digital footprints - the digital traces that people leave while interacting with cyberphysical spaces.