基于IDL的地形三维可视化实现

作为一种第四代的编程语言,IDL具有对海量数据进行获取、分析、可视化以及对多种图像进行处理和交互式操作的功能。在分析IDL的基础上,应用组件编程技术实现了对遥感图像和DEM数据进行地形三维合成及动态模拟的可视化系统设计,经对环境的三维再现和模拟,对生态环境的演变研究可以起到指导作用,而且它具有较好的系统维护和重复使用功能、易于扩展以及面向对象的特点。用该系统建立了吉林西部虚拟自然环境,对三维地形进行空间分析,及吉林西部生态环境数据库的空间和属性数据的查询。

Realization of 3D terrain visualization with IDL

As one of the fourth generation programming languages, IDL possesses lots of functions such as access, analysis, 3D visualization with mass data, image manipulation, interactive operation and so on. In this paper, the 3D visualization and dynamic simulation software system of terrain combined with RS image and DEM data were designed with the IDL using the component technique which has well-maintain and reuse abilities, extensibility and good object-oriented properties. This system can play an important role in the study of environment. Some programming techniques were discussed in the procedure. The software system was applied in western Jilin Province to establish the virtual environment. The 3D terrain visualization was built and it can be used to analyse and query the spatial and attribute data of the ecological environment database of western Jilin Province.