IN2018_E02 Southeast Tasmania Coast Bathymetry 10m - 210m Multi-resolution AusSeabed products

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2018_E02 titled "Marine National Facility Equipment Calibration, Sea Trials and Personnel Training". The voyage took place between September 3 and September 9, 2018, departing from Hobart (TAS) and arriving in Hobart (TAS).\n\nThe purpose of this voyage was to conduct a series of equipment calibrations and trials. \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 Southeast Tasmania Coast produced from the processed EM122 and EM710 bathymetry data.\nLineage: Multibeam data was logged from the EM’s in Kongsberg’s proprietary *.all format and was converted to be processed within Caris HIPS and SIPS version 10.3.1. Once the raw files were converted into the HIPS and SIPS format the data was analysed for noise. Zerotide was applied, and the lines were merged using the vessel file appropriate for either the EM122 or EM710. The data was then gridded at the highest resolution possible and further inspected for outliers.\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.

本图层组收录了"探索者号"（RV Investigator）航次IN2018_E02采集的多波束测深数据，该航次主题为"海洋国家设施设备校准、海上试验与人员培训"。本次航次于2018年9月3日至9月9日开展，从塔斯马尼亚州霍巴特港出发并最终返回霍巴特港。

本次航次的核心目的为开展一系列设备校准与海上试验工作。

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

本数据集包含塔斯马尼亚州东南海岸的水深栅格数据，分辨率介于10米至210米之间，由经过预处理的EM122与EM710测深数据生成。
数据溯源：多波束数据以康斯博格（Kongsberg）专有格式*.all从各EM系列测深系统中记录，随后转换为可在Caris HIPS与SIPS 10.3.1版本软件中处理的格式。原始文件转换至HIPS和SIPS格式后，对数据开展噪声分析。随后应用Zerotide工具进行校正，并利用适配EM122或EM710系统的船舶配置文件完成测线拼接。随后以最高可行分辨率对数据进行网格化处理，并进一步排查异常值。

后续基于AusSeabed多波束指南v2（AusSeabed Multibeam guidelines v2）制定的水深滤波与分辨率匹配准则，通过Python编写的Caris批处理脚本以多种分辨率对数据进行网格化，并再次开展异常值排查。本数据集的L3文件夹中提供最终栅格产品。经处理的原始数据还将按测线导出为GSF与ASCII格式，存放在本数据集的L2文件夹中。