AusBathyTopo (Great Barrier Reef) 30m 2017 - A regional-scale depth model (20170025C)

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°EGreat Barrier Reef C 2020 30m 18-24°S 148-154°EGreat Barrier Reef D 2020 30m 23-29°S 150-156°EThere 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/144348It includes a grid with an area coverage: 8 – 13°S and 139 – 146°EThis dataset is not to be used for navigational purposes.