摘要
为解决露滩地区立体卫星影像精准测绘的难题,利用立体光学卫星影像与激光雷达(light detection and ranging,LiDAR)点云数据在几何定位方面的互补特性,提出了以高精度LiDAR点云数据作为广义控制的立体光学卫星影像高精度测绘方法。首先,对LiDAR深度图与光学卫星影像进行匹配,提取同名点对作为广义控制;然后,将影像和控制一起作为输入进行平差,完成影像准确几何定位;最后,以LiDAR点云数据作为引导,结合多基线、多基元的匹配算法和GRM(geomorphologic refined matching)算法,自动提取露滩地区高精度数字表面模型(digital surface model,DSM)。研究结果表明,综合利用激光点云和立体卫星影像数据,运用摄影测量技术,能够快速准确地生产露滩地区高精度的地形图,对于露滩地形精准测绘具有一定的指导意义。
This study aims to overcome the challenges of precise mapping of open beach areas using stereo satellite imagery.Based on the complementary characteristics of stereo optical satellite imagery and light detection and ranging(LiDAR)point cloud data in geometric positioning,this study developed a high-precision mapping method that employed high-precision LiDAR point cloud data for generalized control.First,the LiDAR depth map was matched with the optical satellite images to extract corresponding point pairs for generalized control.Then,the images and control points were used as inputs for adjustment to achieve an accurate geometric positioning of the images.Finally,guided by LiDAR point cloud data and in combination with multi-baseline and multi-primitive matching algorithms and the geomorphologic refined matching(GRM)algorithm,a high-precision digital surface model(DSM)for open beach areas was automatically extracted.The results of this study indicate that the combined use of laser point clouds and stereo satellite imagery,along with photogrammetric technology,allows for the quick and accurate preparation of high-precision topographic maps of open beach areas.This study provides valuable guidance for the precise mapping of open beach areas.
作者
王宗伟
陆敏燕
范仪琳
WANG Zongwei;LU Minyan;FAN Yilin(Jiangsu Province Surveying and Mapping Engineering Institute,Nanjing 210013,China;Key Laboratory of Land Satellite Remote Sensing Application,Ministry of Natural Resources,Nanjing 210013,China)
出处
《自然资源遥感》
CSCD
北大核心
2024年第4期135-141,共7页
Remote Sensing for Natural Resources
基金
江苏省自然资源发展专项资金(海洋科技创新)项目“江苏自然岸线识别与浅水地形探测技术研究”(编号:JSZRHYKJ202002)资助。
关键词
立体光学卫星
LIDAR点云
几何定位
DSM自动提取
stereo optical satellite
LiDAR point cloud
geometric positioning
DSM automatic extraction
