Precise mapping of open beach areas by combining laser point clouds and stereo optical satellite imagery
WANG Zongwei1,2(), LU Minyan1,2, FAN Yilin1,2
1. Jiangsu Province Surveying and Mapping Engineering Institute, Nanjing 210013, China 2. Key Laboratory of Land Satellite Remote Sensing Application, Ministry of Natural Resources, Nanjing 210013, China
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.
王宗伟, 陆敏燕, 范仪琳. 联合激光点云与立体卫星影像的露滩地区精准测绘[J]. 自然资源遥感, 2024, 36(4): 135-141.
WANG Zongwei, LU Minyan, FAN Yilin. Precise mapping of open beach areas by combining laser point clouds and stereo optical satellite imagery. Remote Sensing for Natural Resources, 2024, 36(4): 135-141.
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2024, Vol. 36 
), 陆敏燕1,2, 范仪琳1,2
