飞马D20激光雷达在数字孪生流域平台建设中的应用

Feima D20 LiDAR in the construction of digital twin watershed platform

数字孪生流域平台的建设以二维、三维数据为底板,建立仿真引擎,实现基础数据、数字孪生底板之间的深度融合,在三维数据获取的过程中有人迹罕至的山川河流、密不透风的森林和荒无人烟的地带。该流域准确的地形、地貌能为平台底板建设和数据分析提供关键数据。常规无人机航空摄影测量技术也难以获取高精度地面点。激光雷达技术可以穿透大部分植被,通过获取海量的三维点云数据,且在分类后获取高精度地表高程数据。本文以某区域数字孪生流域平台项目为例,采用飞马D20无人机搭配DV-LIDAR20激光雷达系统的技术手段,获取测区高精度数字高程模型和正射影像,为数字孪生流域平台建设提供数据基础。从而探讨机载雷达技术在获取森林流域的数字高程模型的优势。

The construction of the digital twin watershed platform uses two-dimensional and three-dimensional data as the baseplate,establishes a simulation engine,realizes the deep integration between the basic data and the digital twin baseplate,and in the process of acquiring three-dimensional data,there are inaccessible mountains and rivers,dense forests,and deserted people.Obtaining accurate topography of the watershed can provide key data for platform floor construction and data analysis.Conventional UAV aerial photogrammetry technology makes it difficult to obtain high-precision ground points.LiDAR technology can penetrate most of the vegetation,obtain massive three-dimensional point cloud data,and obtain high-precision surface elevation data after classification.Taking a regional digital twin watershed platform project as an example,this paper uses the technical means of Feima D20 UAV and DV-LiDAR20 LiDAR system to obtain high-precision digital elevation model and orthophoto of the survey area,so as to provide a data base for the construction of digital twin watershed platform.Therefore,the advantages of airborne radar technology in obtaining digital elevation models of forest watersheds are discussed.