3D Visualization of Massive Terrain Data Based on Grid Partition

A 3D visualization and roaming algorithm of massive terrain data based on grid partition, dynamic RAM and view dependent static LOD model is presented.Area of interest is first subdivided into hierarchical quadtree of square zones.According to the predefined approximation errors of LOD, each quadtree is preprocessed into binary triangle tree and stored as LOD model data files in the form of triangle stripes.View frustum projection culling,data engine of dynamic RAM with multi-thread management and geomorphing are applied to realize 3D visualization and roaming of terrain.Experimental results show that the data processing capacity is unlimited with high efficiency and good effect.