D-OP4000

With the advancement of the construction of real-life three-dimensional China and the rapid development of AI technology, policies, regulations, technical specifications and other documents surrounding the construction of real-life three-dimensional China have been released one after another in recent years. In July 2023, the Ministry of Natural Resources issued the "Overall Implementation Plan for the Construction of Real-life 3D China (2022-2025)" document stating that real-life 3D is a real, three-dimensional and time-series spatial and temporal information that reflects human production, life and ecological space. It is an important new infrastructure for the country and will greatly promote the transformation and upgrading of digital cities into smart cities.

With the continuous transformation and upgrading of my country's "digital city" to "smart city", GIS applications based on two-dimensional vector data have been difficult to meet the needs of urban intelligent management. The important construction task of national basic surveying and mapping during the "14th Five-Year Plan" period, the urban 3D platform can provide the city's 3D base for the comprehensive management of natural resources and smart city management, and provide basic data and information for urban planning, management, fire protection, emergency response, ecological environment monitoring, etc. management platform. Therefore, how to quickly and accurately obtain 3D data in geographic space has become an important support for the 3D construction of real China. UAV oblique photogrammetry has become an important way to obtain oblique photography data due to its efficient and flexible data acquisition capabilities.