基于LOD的三维地形数据的组织与实时绘制

Study of Real-Time Rendering for 3D Virtual Earth terrain Based on the LOD Algorithm

LOD(Levels of Details,细节层次)是解决大规模地形实时渲染的一项关键技术。将LOD应用于三维数字地球中,针对LOD在实时地形绘制、纹理与高程数据映射等方面进行了分析,在采用数据分块、动态LOD技术、动态纹理等技术的基础上实现了海量数据的快速漫游,得到实时显示效果。

LOD is one of solutions to the real-time visualization of large-scale terrain. In this paper, we applied LOD into Web 3D Digital Earth which developed by the Java Applet technology, analysis of the real-time terrain rendering, texture mapping and elevation data, achieved a rapid roaming of massivc terrain data based on the technology of data block, dynamic LOD and texture, achieved better realtime display.