Extraction of typical oyster pile columns in the Maowei Sea, Beibu Gulf, based on unmanned aerial vehicle laser point cloud orthophotos - Du, Jinze; Huang, Meiqin; Kang, Zhenjun; Tian, Yichao; Tao, Jin; Zhang, Qiang; Xie, Yutong; Mo, Jinying; Huang, LiYan; Feng, Yusheng (Frontiers in Marine Science, 2025)