Research and application of key technologies for refined management of urban infrastructure: a case study of 3D reality modeling of squares and roads

With the deepening of urbanization, refined management of urban infrastructure is crucial for improving urban management levels and residents' quality of life. This paper aims to explore how to employ 3D reality data technology to support refined management of urban infrastructure. Taking 3D reality modeling of squares and roads as an example, a series of key technologies for refined management of urban infrastructure supported by 3D reality data are proposed, including 3D modeling based on multi-source point cloud data, automatic extraction and modeling of roads based on point clouds, high-precision true orthophoto images fusing point clouds and imagery, individual extraction of oblique models, and the integration of 2D and 3D information based on geographic grids and coding. On this basis, an empirical study was conducted in a region of Beijing with comprehensive infrastructure element types, achieving remarkable results. The key technical difficulties and solutions were discussed, effectively improving the management level of urban infrastructure and providing beneficial references for theoretical innovation and practical exploration of refined management of urban infrastructure.