Digital city base-oriented point cloud reconstruction method and system

The invention relates to the field of meta universe digital twin smart cities, and provides a digital city base-oriented point cloud reconstruction method and system, and the method comprises the steps: obtaining city region three-dimensional point cloud data of a target city region and determined specific region two-dimensional boundary data in the target city region; performing simplification processing on the three-dimensional point cloud data of the urban area to obtain first point cloud data; adding boundary points of the three-dimensional point cloud data of the specific area into the first point cloud data, and clearing point cloud data within the boundary points of the three-dimensional point cloud data of the specific area to obtain second point cloud data; performing smooth processing on the second point cloud data to obtain third point cloud data; performing grid reconstruction on the third point cloud data to obtain a smooth reconstruction grid; and determining a grid reconstruction result of the