基于osgEarth三维数字地球建设的研究

摘要

The eMule-project based on osgEarth is an important application which combined the geographic information system and virtual reality technology. Taking the three-dimensional earth based on osgEarth for example, this paper used lod, paging, dynamic scheduling and other technologies, researched 3d terrain, image, object organization, scheduling and integrated approach, and also analysed template body technology in drawing linear vector data and scene hierarchy hidden in the technology. In Visual Studio 2010 platform, the OpenSceneGraph was used to program language. The experimental results proved the feasibility of the technology, and realized the construction of three-dimensional digital earth.%基于osgEarth开源工程是将地理信息系统和虚拟现实技术结合起来的一个重要应用。以基于osgEarth三维数字地球建设的研究为例，采用 LOD与分页、动态调度等技术。研究了三维地形、影像、地物组织、调度及融合方式；设计了地球影像数据获取、坐标纹理校正、earth文件编写、矢量数据栅格化显示；分析了 osgEarth中绘制线状矢量数据的模板体技术和该技术所隐藏的场景层次结构。在Visual Studio 2010平台下，使用OpenSceneGraph语言进行编程，证明了该技术的可行性，实现了三维数字地球的建设。