【摘要】 首先分析和总结了不确定空间目标表达的一些主要研究成果和方法 ,建立了场模型下的统一表达 ;继而 ,基于可拓工程方法探讨了动态空间目标的表达 ,并详细阐述了动态集合的概念和定义。更多还原

【Abstract】 The representation of spatial objects is one of key problems on the theory of spatial databases within GIS. Firstly, some important researches and methods of representing spatial objects with uncertainties were analyzed and summarized, and a united representation model was built up based on the fields. Then, how to represent dynamic spatial object was discussed by means of extension engineering method, and the concept and the definition of dynamic set were given in detail.更多还原