High-resolution depth model for the Great Barrier Reef - 30 m

This dataset contains bathymetry (depth) products from the compilation of all available source bathymetry data within the Great Barrier Reef into a 30 m-resolution Digital Elevation Model (DEM).
The Great Barrier Reef (GBR) is the largest coral reef ecosystem on Earth and stretches over 2500 km along the north-eastern Australia margin.
Bathymetry mapping of this extensive reef system is vital for the protection of the GBR allowing for the safe navigation of shipping and improved environmental management.
Over the past ten years, deep-water multibeam surveys have revealed the highly complex shelf-edge drowned reefs and continental slope canyons.
Airborne LiDAR bathymetry acquired by the Australian Hydrographic Service cover most of the GBR reefs, with coverage gaps supplemented by satellite derived bathymetry.
The Geoscience Australia-developed Intertidal Elevation Model DEM improves the source data gap along 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.

The High-resolution depth model for the Great Barrier Reef - 30 m (Version 10 Nov 2020) can be downloaded as four separate but overlapping grids, with the area coverage:
Great Barrier Reef A 2020 30m 10-17°S 143-147°E
Great Barrier Reef B 2020 30m 16-23°S 144-149°E
Great Barrier Reef C 2020 30m 18-24°S 148-154°E
Great Barrier Reef D 2020 30m 23-29°S 150-156°E

There is an updated “Torres Strait Bathymetry 30m 2020 - A High-resolution Depth Model (20200021C)” and can be downloaded at: http://pid.geoscience.gov.au/dataset/ga/144348

It includes a grid with an area coverage:
8 – 13°S and 139 – 146°E

This dataset is not to be used for navigational purposes.

本数据集包含水深（bathymetry）产品，将大堡礁（Great Barrier Reef，GBR）范围内所有可用的原始水深数据整合为30米分辨率的数字高程模型（Digital Elevation Model，DEM）。
大堡礁是全球规模最大的珊瑚礁生态系统，沿澳大利亚东北海岸延伸超过2500千米。
对这片广袤的珊瑚礁系统开展水深测绘，对于大堡礁的保护至关重要，既能保障船舶安全航行，也能优化环境管理工作。
近十年来，深水多波束测量揭示了该区域极为复杂的陆架边缘淹没礁与大陆坡峡谷地貌。
澳大利亚水文局获取的机载激光雷达（LiDAR）水深测量数据覆盖了大堡礁的大部分礁体，覆盖盲区则通过卫星反演水深数据进行补充。
由澳大利亚地球科学局研发的潮间带高程模型（DEM）填补了澳大利亚广阔潮间带区域的原始数据源空白。
所有原始水深数据均以点云形式开展全面编辑以去除噪声，统一采用世界大地测量系统1984（WGS84）作为水平基准面；在条件允许的情况下，采用近似平均海平面（Mean Sea Level，MSL）作为垂直基准面。

大堡礁高分辨率水深模型（30米分辨率，2020年11月10日版本）可分为四个独立且相互重叠的网格文件进行下载，其覆盖范围如下：
大堡礁A（2020年，30米分辨率）：南纬10°-17°，东经143°-147°
大堡礁B（2020年，30米分辨率）：南纬16°-23°，东经144°-149°
大堡礁C（2020年，30米分辨率）：南纬18°-24°，东经148°-154°
大堡礁D（2020年，30米分辨率）：南纬23°-29°，东经150°-156°

另有更新版《托雷斯海峡30米分辨率水深数据集（2020版）——高分辨率水深模型（20200021C）》，可通过以下链接下载：http://pid.geoscience.gov.au/dataset/ga/144348
该数据集的覆盖范围为：南纬8°-13°，东经139°-146°。

本数据集不得用于航行导航用途。