GA339_SOL5650 Oceanic Shoals survey marine underwater video and still images

The Oceanic Shoals survey (SOL5650, GA survey 339) was conducted on the R.V. Solander in collaboration with Geoscience Australia, the Australian Institute of Marine Science (AIMS), University of Western Australia and the Museum and Art Gallery of the Northern Territory between 12 September - 5 October, 2012.

During the survey, underwater video and still images were acquired using the AIMS towed camera system. Video was acquired using a forward-facing camera (files available in sub-folder 'NERP_TOWVID_VIDEOS'), and still images were acquired with a downward-facing camera, with images taken every 10 seconds (files available in sub-folder 'NERP_TOWVID_STILLS'). Video was converted from tapes to compressed .avi files. Video was characterised onboard in real-time using the AIMS' Towvid characterisation scheme. These characterisations are available in sub-folder 'NERP_TOWVID_CSVs'.

Location of ship movement during camera and sled transects are included in the spreadsheet 'SOL5650_GA0339_Stations.xls'. Exact location of the camera during deployment is recorded via the USBL and can be found in sub-folder 'NERP_USBL'.

Video and associated still images were not acquired from STN13CAM09. Video is not available from 27CAM18 and 28CAM19 (these stations were not on the digital files supplied by AIMS), although still images and Towvid characterisations were supplied. Video Tape 12 is the same as Tape 11, as supplied by AIMS. All video files were renamed at GA with a prefix listing stations contained on a given tape/file.

In addition to underwater imagery, laboratory and deck photos were taken of specimens collected from the benthic sled. These are included in the sub-folder 'NERP_SPECIMEN_PHOTOS'

Video and image files or associated parent folders are named by station number, gear code (CAM = underwater camera system, BS = benthic sled) and then the deployment number. For example '48CAM35' represents a video transect from Station 48 that was the 35th video transect on the survey.

Data is presented here exactly as acquired onboard and converted by the AIMS, and positional accuracy or image quality has not been verified.

海洋浅滩调查（SOL5650，澳大利亚地质调查局勘测编号339）由「索兰德号」（R.V. Solander）执行，合作方包括澳大利亚地质调查局（Geoscience Australia）、澳大利亚海洋科学研究所（Australian Institute of Marine Science, AIMS）、西澳大利亚大学以及北领地博物馆与美术馆，勘测周期为2012年9月12日至10月5日。

本次勘测采用澳大利亚海洋科学研究所拖曳摄像系统采集水下视频与静态图像：正向摄像头用于采集视频，视频文件存储于子文件夹「NERP_TOWVID_VIDEOS」；向下摄像头以每10秒一张的频率采集静态图像，对应文件存储于子文件夹「NERP_TOWVID_STILLS」。视频素材先由磁带转录为压缩.avi格式文件；勘测船上同步采用澳大利亚海洋科学研究所的Towvid特征标注方案对视频进行实时特征表征，标注结果存储于子文件夹「NERP_TOWVID_CSVs」。

摄像与雪橇测线的船舶运动轨迹信息收录于电子表格「SOL5650_GA0339_Stations.xls」中。部署阶段摄像头的精确位置通过超短基线定位系统（USBL）记录，相关数据存储于子文件夹「NERP_USBL」。

STN13CAM09站点未采集视频及配套静态图像；27CAM18与28CAM19站点无可用视频素材（该类站点未收到澳大利亚海洋科学研究所提供的数字文件），但已获取对应站点的静态图像及Towvid标注结果。磁带12与澳大利亚海洋科学研究所提供的磁带11内容完全一致。澳大利亚地质调查局已对所有视频文件进行重命名，命名前缀标注了单个磁带/文件包含的测站信息。

除水下影像外，团队还对底栖雪橇采集的标本拍摄了实验室与甲板照片，相关素材存储于子文件夹「NERP_SPECIMEN_PHOTOS」。

视频与图像文件及其上级文件夹均以测站编号、设备代码（CAM代表水下摄像系统，BS代表底栖雪橇）及部署序号命名。例如「48CAM35」代表第48号测站的第35次视频测线。

本次公开的数据与勘测船上采集并由澳大利亚海洋科学研究所转换后的原始数据完全一致，未对定位精度或图像质量进行核验。