Research on Data Lightweight Method for Real Scene 3D Based on Interactive Markup

With the increasing application of geographic information technology in urban planning, environmental monitoring, traffic management and other fields, 3D GIS has become an important tool in many industries. How to achieve efficient rendering of Real Scene 3D has become a key research topic in the industry. Based on the watershed grid segmentation algorithm, improvements are made to the common features of the tourism building combination model. The simplified building combination model is subjected to grid segmentation operations, which involve contact surface recognition screening, edge contour recognition, and interactive contact surface removal. Ultimately, the user's interactive labeling determines whether to remove these contact surfaces. The results show that the method reduces the number of model faces by more than 95%, providing new ideas and solutions for the lightweight of Real Scene 3D data.