基于栅格的GIS三维空间数据模型

3D Spatial Data Models of GIS Based on Grid

空间数据模型是描述GIS空间数据组织和进行空间数据库设计的理论基础，它反映了现实世界中空间实体之间的相互关系，是空间数据处理和空间数据挖掘的核心问题。文章论述了空间数据模型的表示形式，重点讨论了基于栅格的三维空间数据模型，指出了栅格矢量空间数据模型集成化的必要性以及集成化表示方法，给出了将矢量数据转换为栅格数据的欧氏距离变换与算法，为基于栅格空间数据的空间数据处理和空间数据挖掘奠定了基础。

Space data model is the theoretical foundation to describe GIS space data structure and to carry out of space database design, it reflectes the correlation between spatial entity in realization world, it is the key problem for space data handling and space data mining. This paper disserts the represent form of space data model, and discusses three dimensional space data model based on the grid, and points out the integrated necessariness and integrated represent method about the grid-vector spatial data model, and provids a Euclidean distance converting model and algorithm with regard to change from vector data to grid data, as well as establishes the foundation for spatial data handing and spatial data mining.