Abstract: In order to realize real-time transmission and effective display of the terrain landscape data, based on the requirement of different view field of high altitude and surface, this paper presents a terrain data stream transmission strategy based on visibility clipping, it can efficiently determine the visibility of view field and the Level Of Detail(LOD) of key node when position of vision moving. Experimental results show that the terrain data processed by the server can be rapidly transmitted to the client for accurate display.

Key words: terrain scene data, horizon clipping, stream transmission, Level Of Detail(LOD)

摘要： 为实现地形场景数据的实时传输和有效显示，根据高空和地面视点对视野区域的要求，提出基于可见性裁剪的数据流式传输策略，当视点位置移动时，能有效确定视野区域节点的可见性和关键节点的层次细节度。实验结果表明，经过服务器端预处理后的地形数据可快速传输到客户端进行精确显示。

关键词: 地形场景数据, 视域裁剪, 流式传输, 层次细节度

CLC Number: 

• TP393