Together with remote sensing images, GIS, and BIM, LiDAR provides a real spatial framework and foundation for building digital twin cities. LiDAR can detect and draw multi-level geographic space ups and downs (DSM, DEM). It is also an important data for basic geographic information products Digital Orthophoto Map (DOM), Digital Elevation Model(DEM), and Digital Line Map(DLG) Source, can quickly produce large-scale (1:500 to 1:2000) DLG products.
In the construction of large-scale 3D scenes, such as industry-level and city-level physical space digital mapping, compared with other spatial data acquisition technologies, radar laser point cloud data has high precision, supports machine analysis interaction, fast update, and multi-type data Acquisition means joint aerial survey, such as aerial survey, oblique photography; and multi-source 2D and 3D space data registration and fusion, such as BIM, GIS, etc., can render and build a highly simulated, interactive and analyzable "digital twin" true 3D space, support Build a virtual-real mapping, intelligent interactive smart industry, smart city management application platform, such as smart expressway, smart traffic management.