Topographic and bathymetric data, structure from motion imagery, and ground control data collected at Marconi Beach, Wellfleet, Massachusetts in March 2023, U.S. Geological Survey Field Activity 2023-012-FA

The data in this release re-map the beach and nearshore environment at Marconi Beach in Wellfleet, MA and provide updated environmental context for the 2021 CoastCam installation that looks out at the coast shared by beachgoers, shorebirds, seals, and sharks. This is related to the field activity 2022-014-FA and 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-02, which are two video cameras aimed at the beach. In March 2023, U.S. Geological Survey and Woods Hole Oceanographic Institute (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) and a post-processed kinematic (PPK) system attached to a helium powered balloon-kite (Helikite). High-precision GPS targets (AeroPoints) and numbered black and white tarps 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. 1.8.1) was used to create a digital surface model and orthomosaic with the collected imagery.

本发布数据集重新绘制了马萨诸塞州韦尔弗利特市马科尼海滩（Marconi Beach）的海滩及近岸环境，并为2021年安装的海岸相机（CoastCam）系统提供了更新后的环境背景信息——该系统监控着供海滩游客、滨鸟、海豹与鲨鱼共享的沿岸海域。本数据集关联野外作业项目2022-014-FA，且与美国国家公园管理局（National Park Service）在鳕鱼角国家海岸（Cape Cod National Seashore）开展的合作项目相关，该合作旨在监控海岸相机CACO-02视场内的区域——此为两台朝向海滩的视频摄像机。2023年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 Institute, WHOI）的科研人员开展野外勘测，采集地形与水深数据。本次采用搭载于氦气浮空风筝（Helikite）的索尼（SONY）a6000相机与后处理运动解算（post-processed kinematic, PPK）系统，采集了可用于运动恢复结构（structure-from-motion, SfM）的海滩影像。高精度GPS靶标（AeroPoints）与带编号的黑白防水布被用作地面控制点。近岸水深数据则通过安装于具备冲浪作业能力的自扶正电动自主水面载具上的单波束测深仪采集。研究团队采用Agisoft Metashape（v. 1.8.1）软件对采集到的影像进行处理，生成了数字表面模型与正射影像镶嵌图。