摘要
针对球面剖分格网系统的优势和目前矢量数据存储方式存在的缺陷,提出基于球面剖分格网系统的矢量数据组织模型,以期更有效地存储和管理大范围多模式的矢量数据。主要讨论了矢量对象在不同格网层次下的剖分组织方法及其重构表达问题,并创新性地提出了球面矢量交换文件格式(SVE)。同时,基于球面剖分格网系统设计了矢量数据的空间拓扑关系构建模式及多层次表达方式,为球面的矢量对象空间分析奠定了理论基础。
Global GIS is a system,which supports the huge data process and the global direct manipulation on global grid based on spheroid or ellipsoid surface. Global Subdivision Grid which has the open representation of multi-resolution, has even extension and supports great scale transformation is in the ascendant. In order to efficiently store, utilize,manage and analyze the huge global spatial data and location based service,alternatives to a global data model are urgently needed. According to the property of Global Subdivision Grid and the existing disadvantages of storage pattern for current vector data,this paper proposed a new organization model for vector data based on Global Subdivision Grid, to effectively store and manage multi-pattern vector data at large range. The subdivision organization method for vector objects at different grid level and its reconstruction representation problem are mainly discussed,which is the basis for spatial analysis. The Sphere Vector Exchange （SVE） File is designed for the storage of vector data which is the basis of the transmission of vector data in control Meanwhile, the spatial topology rela- tionship for vector data based on Global Subdivision Grid and its multi-layer expression method are constructed,to establish the theoretical foundation for the spatial analysis of vector data on spherical surface.
出处
《地理与地理信息科学》
CSCD
北大核心
2009年第3期23-27,共5页
Geography and Geo-Information Science
关键词
球面剖分格网
矢量数据
组织模型
多层次表达
Global Subdivision Grid
vector data
organization model
multi-layer representation
