在比较不同探月任务取得的月表三维影像数据的基础上,选择中国嫦娥一号全月分幅数字高程模型(DEM)数据作为构建月表地形模型的数据源,并利用ArcGIS、Cass和AutoCAD等软件的功能及其之间的连接关系,研究了基于月球探测数据构建月表三维模型的技术和方法。以月表撞击坑Lichtenberg为例,建立了撞击坑的三维地形模型,并对其精度和影响精度的因素进行了分析。分析结果表明,对于500 m分辨率的原始数据,模型误差较小,产生误差的原因主要包括生成等高线的密度、采点间距等因素。

After comparisons in several three-dimensional image data from different lunar missions, the DEM of China Chang-E is selected as the data source to reconstruct the lunar terrain model. After using functions of ArcGIS, Cass, AutoCAD software and connections among them, it researches technology and method of reconstructing lunar terrain based on DEM. Take the Lichtenberg Lunar Crater as an example, one model of three-dimensional terrain is built, and the precision and factors affecting accuracy of it are analyzed. The result shows that the error for modeling precision is much lower with the data of 500 meters resolution, and causes for errors include density of contour lines, spacing of sampling points and so on.