Parallel Rendering of Large scale DEM Based on Multi core CPU

DEM data is organized in blocks and scheduled with cache. An algorithm based on LoD is implemented with multi core CPU for simplifying the terrain triangulation network dynamically during rendering process. The terrain model is divided into pieces so that the rendering process for each piece can be implemented in parallel. An experimental system based on parallel rendering algorithm is developed, with OpenMP and OpenThreads. The results show that the rendering performance of the 3D DEM system is improved efficiently based on parallel algorithm as compared with traditional algorithm.