基于网格的GIS空间数据可视化

Research on GIS 3D spatial data interoperability based on Grid

网格作为面向互联网的分布式计算方式,促生了可视化领域的一个新研究点——面向网格的可视化。文章首先回顾了网格计算的基本概念,指出WEB GIS存在的不足,进而论述了GRID GIS网格服务系统协议结构和网格服务系统框架,提出了基于SOAP消息、以图层为单位的三维空间数据表达方法,通过解析SOAP消息便可得到符合GML规范的二维矢量数据、属性数据、纹理及模型数据,方便软件之间的数据交换和互操作。最后结合实例实现了网格环境下三维空间数据的可视化。

As an enabling technology for Internet wide distributed computing, grid favors a new research direction—— grid - enabled visualization. To begin with, This paper has reviewed the concept of GRID Computing,pointed out the disadvantages of WEB GIS, then described protocol structure and system framework of GRID GIS,put forward an expression method for 3D spatial data, which is on the basis of simple object access protocol（SOAP） message and map layer unit. Parsing the SOAP message, users can acquire the 2D data according to GML criterion, attribute data, texture data. This method can make data exchange and interoperability convenient between software or GIS system, finally, we illustrated GIS 3D visualization based on Grid.