为建设“绿美广东生态建设数字孪生示范区”,通过点云生成树木三维建模技术,对示范内的核心区位树木进行1∶1仿真。以倾斜摄影获取的高分辨率立体影像数据为底,结合三维树木、建筑和地形等模型构建高精度与标准地理位置的3D森林场景;接入4个智能综合监测点的物联网数据,并在虚拟3D森林场景里表达出来,实现虚拟3D森林场景与现实森林场景的深度融合;结合林木生长模型,模拟出森林的未来状态,构建集数据采集、模型建立、仿真分析和未来预测于一体的沉浸交互式数字孪生系统。通过研究,形成了一整套比较成熟的技术体系,可为建设广东省数字孪生林业一张图提供技术示范和解决方案。

In order to build a green and beautiful Guangdong ecological construction digital twin demonstration area,this articleused point cloud generated tree 3D modeling technology to conduct 1∶1 simulation of the core location trees within the demonstration area.Based on high-resolution stereo image data obtained from oblique photography,a high-precision and standard geographic 3D forest scene was constructed by combining 3D models of trees,buildings,and terrain.At the same time,the Internet of Things data from four intelligent comprehensive monitoring points was connected,and expressed in the virtual 3D forest scene,achieving deep integration between the virtual 3D forest scene and the real forest scene.Combined with the forest growth model,the future state of the forest was simulated,and an immersive interactive digital twin system integrating data collection,model establishment,simulation analysis,and future prediction was constructed.A relatively mature technical systemwas formed through research,providing technical demonstrations and solutions for the construction of a digital twin forestry map in Guangdong Province.