Backscatter grid of the Freycinet Peninsula survey area

Geoscience Australia carried out marine surveys in southeast Tasmania in 2008 and 2009 (GA0315) to map seabed bathymetry and characterise benthic environments through observation of habitats using underwater towed video. Data was acquired using the Tasmania Aquaculture and Fisheries Institute (TAFI) Research Vessel Challenger. Bathymetric mapping was undertaken in seven survey areas, including: Freycinet Pensinula (83 sq km, east coast and shelf); Tasman Peninsula (117 sq km, east coast and shelf); Port Arthur and adjacent open coast (17 sq km); The Friars (41 sq km, south of Bruny Island); lower Huon River estuary (39 sq km); D Entrecastreaux Channel (7 sq km, at Tinderbox north of Bruny Island), and; Maria Island (3 sq km, western side). Video characterisations of the seabed concentrated on areas of bedrock reef and adjacent seabed in all mapped areas, except for D Entrecastreaux Channel and Maria Island. freycinet_4m is an ArcGIS layer of the backscatter grid of the Freycinet Peninsula survey arae produced from the processed EM3002 backscatter data of the survey area using the CMST-GA MB Process This dataset is a contribution to the CERF Marine Biodiversity Hub.澳大利亚地质调查局（Geoscience Australia）于2008年至2009年间在塔斯马尼亚州东南部开展了编号为GA0315的海洋调查，旨在通过水下拖曳视频观测栖息地，绘制海床水深图并表征底栖环境特征。本次数据采集依托塔斯马尼亚水产与渔业研究所（TAFI）的“挑战者号”研究船完成。本次水深测绘共覆盖7个调查区域，分别为：菲欣纳半岛（Freycinet Peninsula，83平方千米，东海岸及陆架区）、塔斯曼半岛（Tasman Peninsula，117平方千米，东海岸及陆架区）、阿瑟港及邻近开放海岸（17平方千米）、修士群岛（The Friars，41平方千米，布鲁尼岛以南海域）、休恩河下游河口（39平方千米）、德恩特雷卡斯托海峡（D'Entrecasteaux Channel，7平方千米，位于布鲁尼岛以北的廷德博奇海域）以及玛丽亚岛（Maria Island，3平方千米，西侧海域）。海床视频表征工作聚焦所有测绘区域内的岩礁及邻近海床区域，但德恩特雷卡斯托海峡与玛丽亚岛除外。freycinet_4m为基于菲欣纳半岛调查区经处理的EM3002后向散射数据，通过CMST-GA MB Process生成的该调查区后向散射网格ArcGIS图层。本数据集为CERF海洋生物多样性枢纽（CERF Marine Biodiversity Hub）的共建成果。