A Large-Scale Landslide Hazard Simulation-Oriented 3D Terrain Modeling and Rendering Approach

A quadtree-based multi-resolution terrain rendering method is hereby proposed for the great memory consumption and difficult realization of the large-scale landslide terrain data rendering in the case of any large-scale landslide terrain rendering. Considering the massive data of large-scale landslide terrain, it is required to manage terrain data hierarchically, construct a linear terrain block quadtree index, search and dispatch terrain data by the proposed terrain block node search method, establish a terrain block node subdivision evaluation system and a terrain edge matching algorithm and bring forward the quadtree-based multi-resolution terrain rendering algorithm accordingly. The experimental results show that the large-scale landslide terrain rendering method is used to guarantee the large-scale landslide terrain data rendering requirements, realize the high fidelity expression of large-scale terrain and lay a foundation for the simulation of large-scale landslide by means of reasonably dispatching 3D scene data.