Backscatter grid of the western side of Maria Island

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. maria_1m is an ArcGIS layer of the backscatter grid of the western side of Maria Island 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.

澳大利亚地质科学局（Geoscience Australia）于2008年至2009年间在塔斯马尼亚东南部开展了编号为GA0315的海洋勘测项目，旨在通过水下牵引式视频（underwater towed video）观测绘制海床水深测绘图，并表征底栖生境（benthic environments）。本次勘测数据由塔斯马尼亚水产与渔业研究所（TAFI）的“挑战者号”研究船采集完成。
本次水深测绘共覆盖7个勘测区域，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）、弗里亚群岛（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）、德恩特卡斯托海峡（D'Entrecasteaux Channel，7平方公里，布鲁尼岛以北廷德博克海域）以及玛丽亚岛（Maria Island，3平方公里，西侧海域）。
海床底栖生境的视频表征工作覆盖所有测绘区域内的基岩礁及其相邻海床区域，但德恩特卡斯托海峡与玛丽亚岛海域除外。
maria_1m为基于本次勘测处理后的EM3002反向散射数据，通过CMST-GA MB Process生成的玛丽亚岛西侧海域反向散射网格的ArcGIS图层。
本数据集系CERF海洋生物多样性枢纽的共建成果。