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《Journal of Dalian University of Technology》 2004-06
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Research on a spatial data warehouse framework for efficient spatial OLAP

CHEN Xi-qian, CHI Zhong-xian~*, XU Shi-hong( Dept.of Comput. Sci. and Eng., Dalian Univ. of Technol., Dalian 116024, China )  
To realize different kinds of spatial OLAP operations and provide spatial decision support more flexibly, a spatial data warehouse framework is studied, in which spatial data cube cooperates with spatial index structure. By incorporating to it, a spatial index structure named aR~*Btree is proposed to support spatial analysis flexibly on complex spatial hierarchies. The aR~*Btree is an improved and conjoint version of the R~*tree and Btree which stores both the hierarchies relations of time and spatial dimension and the aggregate values of them. The framework takes full advantage of traditional data warehousing technology and the favorable characteristics of index structure in hierarchies′ management. By classifying OLAP operations, it shows how these spatial OLAP operations are efficiently supported in the framework. Finally the performance of range aggregate processing is compared with other indices, and the result shows that the node accesses and executive time of aR~*Btree′s range aggregate queries is superior to those of other structures.
【CateGory Index】: TP311.13
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