Extremely large scope: The real-life 3D China includes all areas of China's territory and territorial waters, requiring the mobilization of practitioners from across the country for collection;
The standard is extremely high: city level requirements for 333 prefecture level cities to achieve real-time 3D collection with a resolution better than 5cm, and to update it periodically, posing severe challenges to the stability of equipment and the quality of data;
Time is pressing: It is expected that the city level real 3D will be fully completed by 2025 for prefecture level cities and above, and by 2035 for county-level cities and above;
Difficulty in data application

Through the high-speed flight capability of drones, a single flight can obtain several square kilometers of real-time 3D raw data;
The RTK and PPK technologies of DJI drones can achieve centimeter level satellite positioning accuracy, and the collected data comes with precise spatiotemporal attributes. The produced real-time 3D data can ensure high quality and meet the rigid requirements of time-series collection;
Through the cluster computing capability of DJI Smart Map, multiple high-performance computing nodes can be called to achieve rapid processing of massive data;
DJI Sikong 2 platform and cloud API interface can achieve seamless integration of unmanned aerial vehicle real-time 3D data