RSG的地形实时自适应多分辨率显示算法  

Algorithm on the Real-Time Adaptive Multi-resolution Rendering of Terrain Using RSG Data

作　　者：张俊峰[1] 费立凡[2] 刘文玉[1] 

机构地区：[1]华北水利水电学院资源与环境学院,郑州市北环路36号450045 [2]武汉大学资源与环境科学学院,武汉市珞喻路129号430079

出　　处：《武汉大学学报（信息科学版）》2013年第5期589-593,共5页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(40971244);华北水利水电学院高层次人才科研启动基金资助项目(201206)

摘　　要：从RSG(regular square grid)数据出发,通过数据预处理、保守性屏幕误差、孤立分割和添加拆分点等方法,提出了地形自适应多分辨率显示的新算法。实验证明,该算法在一定程度上消除了当前静态和动态LoD(levels of detail)中存在的问题,具有较高的实用价值,对其他模型的LoD表达也是一种借鉴。Static LoD has been the most commonly used method of three-dimensional display of terrain from the 1970s which was introduced to the present; it is based on the pyramid or multi-tile structure to generate a number of discrete models which have different resolution for real-time calls, simple but containing large amounts of data redundancy and jumping when level-switch. Moreover, the current dynamic LoD also includes some problems, such as complex data structure and single accuracy criterion etc. Based on these, we start from the RSG data and put forward a new algorithm for real-time adaptive multi-resolution rendering through data-preprocessing, conservative screen-error, isolated partition and split-points inserting. Preliminary experiments have proved that the simulated accuracy can be improved greatly with satisfactory speed. Meanwhile, it can also be adapted for other models of LoD expressions.

关 键 词：LOD 保守性屏幕误差 孤立分割 自适应多分辨率显示 

分 类 号：P208[天文地球—地图制图学与地理信息工程]