Abstract
Complex spatial data is the fundamental content of Earth. Spatial data mining plays an important role in Earth. In this paper, it is proposed that Smart earth equals to Digital Earth plus the Internet of Things, which brings a new challenge for spatial data mining. First, the background of spatial data is summarized. Second, Earth is put forward to be an integration of Digital Earth and the Internet of Things. Third, by analyzing the spatial data sources, types and structures, it uncovers that spatial data is the resource of Earth. Fourth, spatial knowledge to discover in Earth are analyzed on its connotations, extensions and categories. It indicates that spatial knowledge is the intelligent sources of Earth. Fifth, based on spatial data characteristics and possible methodologies, the framework of spatial data mining is given under Earth. Finally, the perspective of applicable fields is prospected for spatial data mining under Earth. It is concluded that spatial data mining is one of the fundamental tools to achieve Earth.
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