广东省三维地形场景仿真研究

Study on 3D Terrain Scene Simulation in Guangdong Province

三维地形场景的仿真是虚拟现实技术的关键部分之一。采用SRTM为DEM数据源,以Google Earth影像为仿真纹理,经影像数据截拼、投影转换、SRTM数据无缝拼接,以及Google Earth影像在DEM上的叠加,实现了广东省三维地形场景仿真。三维地形场景仿真更具有立体感和层次感,有利于快速直观地把握各地形地貌要素,在很大程度上缩短读图时间,有效地提高工作效率。

3Dterrain scene simulation is one of the key parts of VR（virtual reality）technology.Using SRTM（Shuttle Radar Topography Mission）as DEM data sources,Google Earth image as simulated texture,it realizes scene simulation of 3Dterrain in Guangdong Province,through the image data snapshots and mosaic,the projection transformation,seamless mosaic of SRTM data,as well as the Google Earth image overlay on the DEM.For 3Dterrain scene simulation with more stereoscopic and layering,it is conducive to quick and intuitive grasp the landform elements.To a large extent,the time of reading image shortened,thus it improves the working efficiency.