4Stefanovic N, Han J W. Object-based Selective Materialization for Efficient Implementation of Spatial Data Cubes.IEEE Transactions on Knowledge and Data Engineering, 2000,12(6):122～126
5Zhou X T, Han J W. Efficient Polygon Amalgamation Methods for Spatial OLAP and Spatial Data Mining.The Sixth SSD, USA,1999
6Papadias D. Efficient OLAP Operations in Spatial Data Warehouses. Technical Report HKUST-CS01-01,Hong Kong,2001
7Shekhar S, Lu C T, Tan X, et al. Map Cube:A Visualization Tool for Spatial Data Warehouses.http://www.cs.umn.edu,2002
