摘要
为了从细节层次(LOD)地形中获取准确的坐标值,依据LOD地形的特点和OpenGL的拾取机制提出了一种与传统方法不同的方案,实验证明该方法无论在精度还是在速度上都能够满足要求。
To get the point coordinates in LOD terrain,this paper presents to a method which is different from the conventional way according to the peculiarity of LOD terrain and the OpenGL selecting system.The experienced result shows that it can meet requirements whether on accuracy or velocity.
出处
《海洋测绘》
2005年第4期70-73,共4页
Hydrographic Surveying and Charting
关键词
地理信息系统
LOD
拾取
规则格网
不规则格网
geographic information system(GIS)
LOD
selecting
regular square grid(RSG)
triangulation irregular network(TIN)
