the only cost-effective technology able to provide data at aglobal scale. Within ten years, commercial services are ex-pected to provide sub-meter resolution images everywhereat a fraction of current costs (Murthy et al. 2014). This levelof temporal and spatial resolution could provide a wealthof data towards sustainable development. Unfortunately, thisraw data is also highly unstructured, making it difﬁcult toextract actionable insights at scale.