Heard and MacDonald Islands (HIMI) multibeam and single beam bathymetry compilation

This record describes collated multibeam and single beam datasets for Heard Island and McDonald Island (HIMI). The dataset was generated for FRDC Project No 2019-169 using a combination of available multibeam (MBES) data (CSIRO RV Investigator), single beam (SBES) data, and existing background bathymetry products. The compiled dataset includes MBES data from RV Investigator voyages IN2016_V01 and IN2020_V01. The SBES data was collected by fishing vessels and the data made available through the FRDC project. Background datasets used include the GEBCO 2022 Grid (GEBCO Compilation Group, 2022) and the AusBathyTopo (Kerguelen Plateau) 100m 2022 - A regional-scale depth model (Beaman, R.J., 2022).

The final product is a compiled and interpolated bathymetry surface for HIMI at 200 m resolution (World Mercator projection) in GeoTIFF format.

NB: Combining datasets from various sources, such as SBES, MBES and satellite derived, will result in artefacts due to the differences in resolution and accuracy of each of these systems.

本数据集记录了赫德岛和麦克唐纳群岛（Heard Island and McDonald Island，简称HIMI）的整合多波束与单波束测深数据集。本数据集为渔业研究与发展公司（Fisheries Research and Development Corporation，FRDC）编号2019-169的项目所生成，整合了公开可用的多波束测深系统（Multibeam Echo Sounder，MBES）数据、单波束测深系统（Single Beam Echo Sounder，SBES）数据以及现有背景水深产品。本次整合的多波束数据来自CSIRO RV Investigator号科考船的IN2016_V01与IN2020_V01航次；单波束测深数据由渔船采集，并通过FRDC项目公开共享。本数据集所用的背景数据包括GEBCO 2022网格（GEBCO汇编组，2022）以及AusBathyTopo（凯尔盖朗高原）2022版100米分辨率区域尺度水深模型（Beaman, R.J., 2022）。

最终成果为赫德岛和麦克唐纳群岛的整合插值水深表面，分辨率为200米，采用世界墨卡托投影，存储格式为GeoTIFF。

注：由于各测量系统的分辨率与精度存在差异，整合多来源数据集（如单波束、多波束及卫星衍生数据）时会产生伪影。