基于四叉树的地形可视化研究

Study on Terrain Visualization Based on Quad-Tree

在分析四叉树多分辨率地形表示模型的基础上,描述基于四叉树的地形可视化基本过程。为使四叉树多分辨率地形可视化方法适应于更多的应用环境,探讨四叉树多属性节点评价函数的构造方法,通过调节评价函数中各属性评价值前的权值,使得多个属性共同影响地形简化的同时,又能保证应用环境中重要的属性信息失真最小。

At the base of studying and analyzing multi--resolution quad--tree terrain denotation model, the basic process of terrain visualization based on quad--tree is showed. The construction method of quad--tree multi--attributes evaluation node function which can let the quad--tree visualization suitable for more application situation is discussed. According to the adjustment of the weights before the attributes value, the multi--attributes can facilitate terrain simplification, and at the same time it can ensure the distortion of the attributes which are important to application situation lowest.