| With the acceleration of the urbanization process,the accurate acquisition of underground space information,as the basic data of construction and management,is of great significance to the planning and design of underground space.In recent years,underground space has been built in cities,showing the problems of difficult parking,traffic congestion and low utilization rate of parking space.This paper takes the underground space of Shanghai South Railway Station as the experiment object.When entering the underground garage for parking,the public generally enters the garage according to the signs,and has no information about the parking space and road conditions inside,so it is urgent to be solved urgently.3D laser scanning technology has become an important development direction of underground space visualization.When the ZEB-HORIZON handheld laser scanner scans the underground space,extend the satellite data in the RTK reference station is extended into the scanner,corrects the GPS data in the scanner in real time,and move the assigned point cloud.Is compatible with scanning transmission data Trimble Real Works software segmentation classification processing interference noise points,splicing registration more characteristic points of station,unified coordinate system,complete coordinate conversion,streamline the cross section,compare the original coordinates,analysis of error source,optimize coordinate calculation error,using 3D Max modeling method to obtain part of indoor 3 d rendering.Laser point cloud imaging technology,while ensuring the accuracy of the scanning efficiency,quickly to the overall scene in building features data,three-dimensional intuitive display underground space structure,for the digital wisdom city construction provides a perfect three-dimensional space,for urban underground space management also has important reference value,to speed up the construction of China’s rule of law civilization and the development of Chinese humanitarian spirit. |
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