IN2017_C01 Great Australian Bight Bathymetry 10m - 210m Multi-resolution AusSeabed products

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2017_C01 titled "Great Australian Bight (GAB) deep water geological and benthic ecology program". The voyage took place between April 11 and April 27, 2017, departing from Hobart (TAS) and arriving in Hobart (TAS).\n\nThe purpose of this voyage was built around three main scientific objectives:\n1. The benthic characterisation and sampling outcropping sedimentary rocks to aid understanding of modern seabed erosional mechanisms, sedimentary processes and paleo-environmental reconstruction.\n2. Benthic characterisation and sampling in areas of potential seepage to determine if fluid escape is occurring and the nature of the fluids and their relationship to the benthic fauna in these areas.\n3. Sampling of benthic fauna over a large geographic area to establish deep water community structure and function and augment understandings gained from recent IN2015_c01 and IN2015_c02 voyages.\n\nThis dataset is published with the permission of CSIRO. Not to be used for navigational purposes.\n\nThe dataset contains bathymetry grids of 10m to 210m resolution of the Great Australian Bight produced from the processed EM122 and EM710 bathymetry data.\nLineage: CARIS version 9.1.9 was used to process the data. \n\nThe data was then gridded at multiple resolutions in python Caris batch script using a Depth filter Vs Resolution guideline derived from AusSeabed Multibeam guidelines v2 and further inspected for outliers. Final raster products are available in L3 folder of this collection. Final processed data were also exported per line as GSF and ASCII format and available in the L2 folder of this collection.

本图层组描述了“调查者号（RV Investigator）”科考航次IN2017_C01采集的多波束回声测深（multibeam echosounder）数据，该航次主题为“大澳大利亚湾（Great Australian Bight, GAB）深水地质与底栖生态计划”。本次航次于2017年4月11日至4月27日开展，从塔斯马尼亚州霍巴特港起航并最终返回霍巴特港。

本次航次的核心科学目标共三项：
1. 开展底栖特征表征与出露沉积岩采样工作，以助力解析现代海底侵蚀机制、沉积过程及古环境重建研究。
2. 在潜在流体渗漏区域开展底栖特征表征与采样，以明确是否存在流体逸出现象、流体的性质及其与该区域底栖生物群落的关联。
3. 在大范围地理区域内采集底栖生物样本，以厘清深水生物群落的结构与功能，并深化对IN2015_c01及IN2015_c02航次已有研究成果的认知。

本数据集经澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO）许可发布，不得用于导航用途。

本数据集包含基于经过处理的EM122与EM710水深数据生成的大澳大利亚湾水深栅格产品，分辨率覆盖10米至210米区间。

数据处理溯源：采用CARIS 9.1.9版本软件完成初始数据处理。随后基于澳大利亚海底多波束指南（AusSeabed Multibeam guidelines）v2版推导的水深过滤器与分辨率准则，通过Python编写的CARIS批处理脚本将数据网格化为多种分辨率，并对异常值进行筛查。本合集的L3文件夹中存储最终栅格产品；此外，经处理的单航线数据已导出为GSF与ASCII格式文件，可在本合集的L2文件夹中获取。