提出基于格网划分的实时LOD 分层方法, 该方法基于DEM 和影像数据固有的栅格特点, 使用简单的几何算法即可实现DEM 数据的动态分层, 计算量小, 可实现对大数据集DEM 数据的实时漫游.-Grid based on the division of real-time LOD stratification method based on DEM and raster image data inherent characteristics, the use of simple geometric algorithm can be realized DEM data dynamic layering, a small amount of calculation can be realized for large data sets DEM data in real-time roaming.