无人机机载LiDAR在沿海滩涂大比例尺地形测绘中的应用

Application of unmanned aerial vehicle airborne LiDAR in large scale topographic mapping of coastal beach

以南京市以下长江12.5m深水航道建设工程中的白茆沙整治建筑物工程的年度监测为例,介绍了利用无人机航摄和机载LiDAR技术进行大比例尺高精度的滩涂地理信息数据采集的关键技术。研究案例表明,采用无人机搭载数码相机和LiDAR联合进行数据采集,在小区域、通行困难地区的高分辨率影像和地面高程数据快速获取方面具有明显优势,为沿海滩涂开发中的工程用图测绘工作提供了一种新的有效快捷的技术手段。

Taking the annual monitoring of Baimaosha regulation building project of 12.5 m deep-water channel project from Nanjing in the Yangtze River as an example,with UAV aerial photography and airborne LiDAR technology,this paper introduces the key technologies of acquiring large scale and high precision geographic information data of beach.This case study shows that the use of UAV equipped with digital cameras and LiDAR for data acquisition has obvious advantages in the acquisition of high-resolution images and ground elevation data in small areas and difficult areas.It provides a new way for engineering mapping in the development of coastal beach.Moreever,it is an efficient and fast technical means.