基于Terra Vista的流域地形三维建模方法

三维地形建模是实现流域仿真模拟的基础工作，快速智能地生成三维地形则是地形建模的关键技术。本文结合都江堰流域地形模拟，基于Terra Vista软件进行了建模方法研究。将地形等高线资料、遥感影像资料和道路、水系、渠道、建筑物、植被等经过转换配准后，以地形DEM、遥感影像、矢量数据的形式集成于一体载入Terra Vista，统一生成了都江堰地形模型。文章阐述了地形生成的具体步骤，探讨了流域摸拟中天然河道和人工渠道的建模技术，为流域模拟仿真提供了快速智能的三维地形生成方案。

A 3D watershed terrain modeling method based on software Terra Vista

3D terrain modeling is a fundamental procedure of watershed virtual reality and simulation.How to generate the 3D terrain swiftly and intelligently is a critical technology of terrain modeling.Combined with the terrain simulation of Dujiangyan,the modeling method is studied based on software Terra Vista.After the transformation and calibration of the contour data,remote sensing images and vector data,these data are imported into software Terra Vista and the Dujiangyan terrain model is then generated.The detailed generating procedure of terrain model is discussed in this paper,the modeling techniques of natural river course and artificial channel in watershed simulation offers a swift and intelligent method for 3D terrain generation in watershed virtual reality and simulation.