基于格网划分的大数据集DEM三维可视化

3D Visualization of Large DEM Data Set Based on Grid Division

摘要: 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.

Abstract: In this paper，a real-time LOD division method based on grid division is developed．Based on raster characteristics of DEM and image data，this method uses a simple geometric algorithm to implement the dynamic DEM data delamination．It costs much less calculation time，and could obtain fast visualization and animation of large DEM data set．