Backscatter grid of the Port Arthur 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. parthur_1m is an ArcGIS layer of the backscatter grid of the Port Arthur survey area 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年与2009年在塔斯马尼亚东南部开展了编号为GA0315的海洋勘测工作，旨在通过水下拖曳视频观测生境，绘制海底水深地形图并表征底栖环境。本次数据采集使用塔斯马尼亚水产与渔业研究所（TAFI）的“挑战者号”研究科考船。本次水深测绘共覆盖7个调查区域，具体包括：菲欣纳半岛（Freycinet Peninsula，83平方公里，东海岸及陆架区）、塔斯曼半岛（Tasman Peninsula，117平方公里，东海岸及陆架区）、亚瑟港及邻近开放海岸（17平方公里）、修士群岛（The Friars，41平方公里，布鲁尼岛以南海域）、休恩河下游河口（39平方公里）、德恩特雷卡斯托海峡（D'Entrecasteaux Channel，7平方公里，位于布鲁尼岛北部的廷德博克（Tinderbox）区域）以及玛丽亚岛（Maria Island，3平方公里，西侧海域）。除德恩特雷卡斯托海峡与玛丽亚岛外，所有测绘区域内的海底视频表征工作均聚焦于岩礁底质区域及其邻近海底。parthur_1m为亚瑟港调查区的后散射栅格ArcGIS图层，系通过处理该调查区的EM3002型后散射数据，并依托CMST-GA MB Process工具生成。本数据集为CERF海洋生物多样性中心（CERF Marine Biodiversity Hub）的贡献项目之一。