View-angles of spatial data mining

This paper proposes a view-angle of spatial data mining to match the various demands on spatial data mining. Describing the various demands from different users under different spatial conditions, the view-angles of spatial data mining is to discover the knowledge with various granularities from amounts of spatial data by using a certain mining algorithms. First, the view-angle of spatial data mining is defined within its intension and extension. Second, the view-angle based algorithms are presented. Finally, as a case study, the techniques are applied to mine Baota landslide-monitoring database. The results are satisfactory.