Revision of the Kerguelen Plateau bathymetric grid

This record was superseded on 13/02/2023 with approval from the Director, National Seabed Mapping as it has been superseded by eCat 147703

The existing regional bathymetric grid of the Kerguelen Plateau, south-west Indian Ocean, was updated using new singlebeam echosounder data from commercial fishing and research voyages, and some new multibeam swath bathymetry data. Source bathymetry data varies from International Hydrographic Organisation (IHO) S44 Order 1a to 2. The source data were subjected to area-based editing to remove data spikes, then combined with the previous Sexton (2005) grid to produce a new grid with a resolution of 0.001-arcdegree. Satellite-derived datasets were used to provide island topography and to fill in areas of no data. The new grid improves the resolution of morphological features observed in earlier grids, including submarine volcanic hills on the top of the Kerguelen Plateau and a complex of submarine channels draining the southern flank of the bank on which Heard Island sits. The Heard and McDonald Islands are situated on the Kerguelen Plateau and lie within Australia's marine jurisdiction.This dataset is not to be used for navigational purposes.

本记录已于2023年2月13日经国家海床测绘局局长批准被取代，其替代记录为eCat 147703。

西南印度洋克尔格伦高原（Kerguelen Plateau）现有的区域水深网格已通过整合来自商业捕鱼和研究航行的新型单波束回声测深仪数据，以及部分新型多波束条带测深数据完成更新。源水深数据的精度范围涵盖国际水文组织（International Hydrographic Organisation, IHO）S44标准的1a级至2级。源数据经过区域化编辑以去除数据尖峰，随后与先前的Sexton（2005）网格合并，生成分辨率为0.001弧度的新网格。卫星衍生数据集被用于补充岛屿地形信息及填补无数据区域。新网格提升了早期网格中观测到的形态特征分辨率，包括克尔格伦高原顶部的海底火山丘，以及赫德岛（Heard Island）所在海台南翼的海底水道复合体。赫德岛和麦克唐纳群岛（Heard and McDonald Islands）位于克尔格伦高原，且处于澳大利亚海洋管辖权范围内。本数据集不得用于导航用途。