3DGIS中空间数据可视化的研究与应用

Research and application of spatial data visualization in 3DGIS

空间数据可视化是当前3DGIS领域的研究热点之一。提出了一种面向对象的空间数据可视化模型,基于金字塔模型来组织和调度DEM(数字高程模型)、DOM(数字正射影像)等栅格数据,并引入矢量数据参数化3D建模思想,实现了矢量地物数据的三维建模与可视化。在此基础上,借助虚拟现实技术,基于OpenGL实现了一个3DGIS原型系统,具备空间数据的真实感可视化表达、3D场景实时漫游、交互查询等功能。最后给出了基于该原型系统为军事与民用领域开发的应用实例。

Visualization of spatial data is one of research emphases in 3DGIS. At first, a new object oriented model for visualization of spatial data is introduced, which includes a pyramid model to organize raster data such as DEM and DOM data, and a new method for 3D modeling of vector data according to parameters. Based on openGL and virtual reality techniques, a 3DGIS prototype is designed and implemented which includes such functions as visualization of spatial data, flying via 3D scene and information inquiring. At last, some applications based on this prototype in military affairs and civil affairs are given.