How to model 3D scene and its precision subdivision in digital twinning?

Digital twinning refers to the twinning of physical entities established by software models, which is used to simulate, predict and analyze their performance and dynamics. Three-dimensional scene modeling is the key link of digital twins, and it is usually necessary to establish the geometric and functional representation of physical entities or environments in virtual space. The following are the main methods of 3D scene modeling in digital twinning and the corresponding precision subdivision:?

According to the needs of customers and different data sources, different modeling methods, including point cloud reverse modeling, drawing modeling, photo modeling, oblique photography model reconstruction, are adopted to realize the construction of all-factor 3D scenes, which can meet the modeling needs of different types of objects and scenes.

The modeling method can combine photos, oblique photography and point clouds to achieve the accuracy and efficiency of the model. In order to meet different requirements, such as real-time requirements, data storage and processing capabilities, the model accuracy can also be different at the following levels:

High precision level: the details to be paid attention to and the sense of reality are very high, which is suitable for precision engineering simulation or maintenance of high-value assets.

Medium accuracy level: the model is simplified but still retains the main information and characteristics, and is often used in architecture and urban planning.

Low accuracy level: it focuses on the overall layout and general shape, and is suitable for preliminary conceptual design or large-scale planning.

According to the availability of application scenarios and resources, it is one of the important considerations to use appropriate modeling methods and accuracy levels to realize digital twin projects.