Abstract: In order to realize the visualization of 3D maps in the development of autonomous vehicles and simulate real roads in the simulator, a set of data restoration techniques is proposed. By transforming the latitude and longitude (WGS84) coordinate system of the original data into the ECEF coordinates, the 3D modeling software (Blender) API is used to automatically generate the polygon mesh without compiling the ESRI data. At the same time, in order to improve the efficiency of data use, further NEU coordinate segmentation is performed to maximize the convenience of the mesh. The generated 3D mesh is used respectively by the physics modules and rendering modules of the simulator. For the requirements of high visual quality, a method of interpolation optimization for map data is also proposed, which realizes realistic restoration of scene and good visualization effect. Due to no human involvement, automated processes can control human error and improve efficiency.

Key words: high precision maps, rendering algorithm, visualization, interpolation optimization, intelligent car simulator