Topographic and bathymetric data, imagery, and ground control data collected at Head of the Meadow Beach, Truro, Massachusetts in February and March 2024

The data in this release re-map the beach and nearshore environment at Head of the Meadow Beach in Truro, MA and provide updated environmental context for the 2020 CoastCam installation that looks out at the coast shared by beachgoers, shorebirds, seals, and sharks. This is a collaboration with the National Park Service at Cape Cod National Seashore to monitor the region that falls within the field of view of CoastCam CACO-01, which are two video cameras aimed at the beach. In February and March 2024, U.S. Geological Survey and Woods Hole Oceanographic Institution (WHOI) scientists conducted field surveys to collect topographic and bathymetric data. Images of the beach for use in structure-from-motion were taken with a camera (SONY a6000) attached to a helium powered balloon-kite (Helikite). High-precision GPS targets (AeroPoints) were used as ground control points. Bathymetry was collected in the nearshore using a single-beam echosounder mounted on a surf capable self-righting electric autonomous surface vehicle. Agisoft Metashape (v. 2.1.0) was used to create a digital surface model and orthomosaic with the collected imagery.

本次发布的数据重新绘制了马萨诸塞州特鲁罗镇梅多角海滩（Head of the Meadow Beach）的海滩及近岸环境，并为2020年部署的海岸相机（CoastCam）系统提供了更新后的环境背景——该系统监测的海岸区域为游客、滨鸟、海豹与鲨鱼共享的活动海域。本项目与鳕鱼角国家海岸的美国国家公园管理局（National Park Service）合作，对海岸相机（CoastCam）CACO-01视场内的区域进行监测，该设备包含两台朝向海滩的摄像机。2024年2月至3月，美国地质调查局（U.S. Geological Survey）与伍兹霍尔海洋研究所（Woods Hole Oceanographic Institution, WHOI）的科研人员开展野外调查，采集地形与水深数据。本次研究采用搭载于氦气气球风筝（Helikite）的索尼（SONY）a6000相机采集海滩影像，用于运动恢复结构（structure-from-motion）流程。调查期间使用高精度GPS靶标（AeroPoints）作为地面控制点。近岸水深数据则通过搭载于具备冲浪作业能力的自扶正电动自主水面载具的单波束测深仪采集获取。研究团队采用Agisoft Metashape（版本2.1.0）对采集的影像进行处理，生成数字表面模型与正射影像镶嵌图。