IN2017_E03 South East Queensland Coast Bathymetry 10m - 210m Multi-resolution AusSeabed products

This layer group describes multibeam echosounder data collected on RV Investigator voyage IN2017_E03 titled "Brisbane Port Period Sea Trials". The voyage took place between August 20 and August 23, 2017, departing from Brisbane (QLD) and arriving in Brisbane (QLD). \n\nThe purpose of this voyage was equipment and commissioning trials during the port period in Brisbane prior to in2017_v04.\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 South East Queensland 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 9.1.2. 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. Data from line turns or otherwise poor quality were deleted, resulting in some empty lines of 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.

本图层组收录由RV探索者号（RV Investigator）执行的IN2017_E03航次采集的多波束测深声呐（multibeam echosounder）数据，该航次主题为"布里斯班港期海上试航"（Brisbane Port Period Sea Trials）。本航次于2017年8月20日至8月23日执行，起讫港均为昆士兰州布里斯班。

本航次旨在2017_v04航次执行前，于布里斯班港驻留期间开展设备调试与试航工作。

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。

本数据集包含由经处理的EM122与EM710测深数据生成的昆士兰州东南海岸水深栅格产品，分辨率区间为10米至210米。

数据溯源：多波束数据源自康斯伯格（Kongsberg）专有*.all格式的EM系列测深系统日志，先行转换为可在Caris HIPS与SIPS 9.1.2版本中处理的格式。原始文件转换完成后，对数据开展噪声分析，并应用Zerotide校正，随后使用适配EM122或EM710的船舶配置文件完成测线合并。随后以最高可行分辨率对数据进行栅格化处理，并进一步排查异常值；移除测线转弯段或其他低质量数据，导致部分测线出现数据空白。

随后基于澳大利亚海底测绘多波束测深指南v2（AusSeabed Multibeam guidelines v2）制定的水深-分辨率过滤准则，通过Python编写的Caris批处理脚本对数据进行多分辨率栅格化，并再次排查异常值。本数据集的最终栅格产品存放于本合集的L3文件夹中；最终处理后的单条测线数据以GSF与ASCII格式导出，存放于本合集的L2文件夹中。