Urban full space full elements geographical entity

Aug 25, 2023

For the automatic batch construction of level 1 and 2 monomer models of urban buildings, the combined processing technology of "airborne laser + oblique photography +DLG" can be adopted to extract the building point cloud data after the obtained airborne laser point cloud data is preprocessed and classified. Building vertex clustering, roof plane fitting, roof boundary and topological relationship analysis are used to obtain the roof structural plane. Based on the building vector data extracted from the existing DLG, the point cloud data is combined to stretch the building height, obtain the roof structural plane, and automatically build the building white model in batches. Through the automatic matching of oblique image and 3D model, the texture of building model is automatically generated by oblique image.