最后，基于数学工具———代数系统，给出了空间数据立方体严格的数学定义。
At last, based on a mathematical tool: algebraic system, this paper gives definition of spatial data cube.
本文提出了数据超立方体模型，并在代数表达方面进行了改进，使得其可以支持OLAP操作。
In this paper, we address this issue by proposing a model of a data-cube and an algebra to support OLAP operations on this cube.
本文提出了数据超立方体模型，并在代数表达方面进行了改进，使得其可以支持OLAP操作。
In this paper, we address this issue by proposing a model of a data-cube and an algebra to support OLAP operations on this cube.
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