AusBathyTopo (Northern Australia) 30m 2018 - A High-resolution Depth Model (20180020C)

This dataset contains bathymetry (depth) products from the compilation of all available source bathymetry data within Northern Australia into a 30 m-resolution Digital Elevation Model (DEM).

The Northern Australia region includes a broad continental shelf over 400 km wide extending out from Western Australia and the Northern Territory, and stretching over a distance of ~1500 km.

This region encompasses numerous shallow coral reefs including the offshore Sahul Banks, sand cays, drowned ancient river valleys, broad inner-shelf banks and a rugged coastline.

Bathymetry mapping of the seafloor is vital for the protection of Northern Australia, allowing for the safe navigation of shipping and improved environmental management.

Shallow- and deep-water multibeam surveys have revealed the highly complex seafloor of the continental shelf and adjacent slope canyons draining into the Indian Ocean and Timor Sea.

Airborne LiDAR bathymetry acquired by the Australian Hydrographic Office cover most of the Sahul Banks reefs, with some coverage gaps supplemented by satellite derived bathymetry.

The Geoscience Australia-developed Intertidal Elevation Model DEM improves the source data gap along Northern Australia’s vast intertidal zone.

All source bathymetry data were extensively edited as point clouds to remove noise, given a consistent WGS84 horizontal datum, and where possible, an approximate MSL vertical datum.

本数据集将澳大利亚北部区域内所有可获取的原始水深测绘（bathymetry）数据进行整合，生成30米分辨率的数字高程模型（DEM）水深产品。

澳大利亚北部区域涵盖宽逾400公里的广阔大陆架，该陆架从西澳大利亚州和北领地向外延伸，整体跨度约1500公里。

该区域包含众多浅海珊瑚礁群，包括离岸的萨胡尔滩礁群（Sahul Banks）、沙礁岛、淹没古河谷、广阔的陆架内滩以及崎岖不平的海岸线。

海底水深测绘对澳大利亚北部的保护工作至关重要，可保障船舶航行安全并优化环境管理效能。

浅海与深海多波束勘测表明，这片大陆架及周边汇入印度洋与帝汶海的陆坡峡谷区域，海底地形极具复杂性。

由澳大利亚水文局（Australian Hydrographic Office）获取的机载激光测深（Airborne LiDAR bathymetry）数据覆盖了萨胡尔滩礁群的大部分区域，部分数据覆盖空白由卫星衍生水深数据补充完善。

由澳大利亚地质科学局（Geoscience Australia）开发的潮间带高程模型DEM，填补了澳大利亚北部广阔潮间带区域的原始数据空白。

所有原始水深测绘数据均以点云形式开展全面编辑以去除噪声，统一采用WGS84水平基准面，并在可行范围内采用近似平均海平面（MSL）垂直基准面。