"an end-to-end open-source framework for creating georeferenced pedestrian networks from aerial imagery"

""[T[he first open-source scene classification model for pedestrian infrastructure from sub-meter resolution aerial tiles" — or, in layman's terms, the first free tool that uses machine learning technology to scan satellite imagery for the presence of sidewalks and crosswalks." - Streetsblog

Paper by Maryam Hosseini, Andres Sevtsuk, Fabio Miranda, Roberto M. Cesar Jr, and Claudio T. Silva.