AusBathyTopo 250m (Australia) 2023 Grid - A High-resolution Depth Model for Australia (20230004C)

The AusBathyTopo 250m (Australia) 2023 Grid is a high-resolution depth model for Australia that replaces the Australian Bathymetry and Topography Grid, June 2009.

This publication is the result of a collaborative partnership between Geoscience Australia, the Australian Hydrographic Office, James Cook University, and the University of Sydney. It has been compiled using 1582 unique data sources from multibeam echosounders, single-beam echosounders, LiDAR, 3D seismic first returns, Electronic Navigation Charts and satellite derived bathymetry alongside higher-resolution regional compilations. In particular, the map incorporates new innovations such as the use of earth observation data (satellite based) produced by Digital Earth Australia to improve shallow coastal depth modelling to present a seamless transition between land and sea. All source bathymetry data were extensively edited as 3D point clouds to remove noise, given a consistent WGS84 horizontal datum, and where possible, an approximate MSL vertical datum. This new continental-scale grid represents decades of data collection, analysis, investment and collaboration from Australia’s seabed mapping community and is a significant improvement on the 2009 compilation.

The data extends across a vast area from 92°E to 172° E and 8°S to 60° S. This includes areas adjacent to the Australian continent and Tasmania, and surrounding Macquarie Island and the Australian Territories of Norfolk Island, Christmas Island, and Cocos (Keeling) Islands. Australia's marine jurisdiction offshore from the territory of Heard and McDonald Islands and the Australian Antarctic Territory are not included.

We acknowledge the use of the CSIRO Marine National Facility (https://ror.org/01mae9353 ) in undertaking this research. The datasets used were collected by the Marine National Facility on 43 voyages (see Lineage for identification).

This dataset is not to be used for navigational purposes.

AusBathyTopo 250m（澳大利亚）2023网格是面向澳大利亚的高分辨率水深地形模型，替代了2009年6月发布的《澳大利亚水深与地形网格》。

本成果系澳大利亚地质调查局（Geoscience Australia）、澳大利亚水文局（Australian Hydrographic Office）、詹姆斯·库克大学（James Cook University）与悉尼大学（University of Sydney）协同合作的产物。研究整合了1582份独特数据源，涵盖多波束测深仪（multibeam echosounders）、单波束测深仪（single-beam echosounders）、激光雷达（LiDAR）、三维地震首次反射波（3D seismic first returns）、电子航海图（Electronic Navigation Charts）、卫星测深数据，以及更高分辨率的区域整合数据集。本成果尤为突出的创新在于，采用了澳大利亚数字地球（Digital Earth Australia）生成的卫星基地球观测数据，以优化近岸浅水区水深建模，实现海陆边界的无缝衔接。所有原始水深数据均以三维点云形式开展了系统性降噪处理，并统一采用WGS84水平基准面；在条件允许的情况下，还采用了近似平均海平面（MSL）垂直基准面。这一全新的大陆尺度网格集成了澳大利亚海底测绘领域数十年的数据采集、分析、资源投入与协作成果，相较于2009年的整合数据集实现了跨越式升级。

本数据集覆盖范围广阔，经度跨度为92°E至172°E，纬度跨度为8°S至60°S，涵盖澳大利亚大陆及塔斯马尼亚周边海域、麦夸里岛周边海域，以及诺福克岛（Norfolk Island）、圣诞岛（Christmas Island）、科科斯（基林）群岛（Cocos (Keeling) Islands）等澳大利亚海外领地周边海域。但不包含赫德岛和麦克唐纳群岛（Heard and McDonald Islands）以及澳大利亚南极领地（Australian Antarctic Territory）所辖的澳大利亚海洋管辖海域。

本研究致谢澳大利亚联邦科学与工业研究组织（CSIRO）国家海洋研究设施（Marine National Facility，https://ror.org/01mae9353 ）的支持与使用许可。所用数据集由该国家海洋研究设施在43个科考航次中采集，详细标识信息请参见溯源说明。

本数据集不得用于航海导航用途。