IMAS Metadata Catalogue
elevation
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This dataset contains polygon extents of all known bathymetry surveys and bathymetry compilations in Australia's marine jurisdiction, including the Australian Antarctic Territory. Each polygon includes metadata identifying attributes, contact details, information on the public availability of data, and (in the case of published data) gridded resolution. The following data sources have been used as inputs: • AusSeabed 'Bathymetry Acquisitions Coverage (Dynamic)' (https://dx.doi.org/10.26186/148613) • AusSeabed 'Bathymetry Compilations Coverage (Dynamic)' (https://dx.doi.org/10.26186/148614) • computed footprints (suffixed by _L0_Coverage) of bathymetry data published through AusSeabed Warehouse Geoserver (https://warehouse.ausseabed.gov.au/geoserver) • computed footprints (suffixed by _BBOX) of bathymetry data published through CSIRO Geoserver (https://www.cmar.csiro.au/geoserver) • manually computed footprints of bathymetry data published through other online repositories: WA Bathymetry Portal (https://dot-wa.maps.arcgis.com/apps/webappviewer/index.html?id=d58dd77d85654783b5fc8c775953c69b), the Australian Ocean Data Network (https://portal.aodn.org.au) and the NSW SEED Portal (https://www.seed.nsw.gov.au) This dataset was generated to enable reporting for Seamap Australia's 'State of Knowledge' functionality (https://seamapaustralia.org/map/), as existing coverage information does not contain metadata on gridding resolution. The dataset is live and will be continually updated as new surveys are conducted and new coverage information becomes available. Gridding resolution will be appended to existing survey extents when historical surveys are published. This dataset is updated regularly (date of last update: 23/05/2025) and will be maintained in perpetuity until such time that the information required for Seamap Australia's 'State of Knowledge' functionality is delivered through an alternative mechanism. Note that a degree of spatial simplification has been conducted to reduce filesize and polygon complexity. All efforts have been made to maintain true survey extent (area-preserving simplification has been used), but polygons may not be representative of the true survey extents, particularly in the case of reported extents from unpublished surveys which cannot be verified.
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IMAS/CSIRO undertook a multibeam mapping campaign in eastern and Southern Tasmania to map shelf waters of the Freycinet, Huon and Tasman Fracture Marine Parks and several reference areas for the Tasman Fracture Park, including waters around Pedra Brancha and South-west Cape. The dataset includes a post-processed transit along the mid-shelf i=of Western Tasmania. The dataset includes raw mutibeam outputs and post-processed data, including Caris Files, xyz data and geotiffs. A data report for this has been produced by CSIRO. The study was intended to increase knowledge of the distribution of habitats within the SE Australian Australian Marine Park network, and at nearby reference areas with similar habitat. This information is required to underpin subsequent biological monitoring of key habitats within the AMP network, and to contrast the observations within parks with nearby fished locations to determine the extent that changes in biological communities are driven by natural vs anthropogenic pressures.
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The principle aim of this project was to map the fine-scale spatial distribution of key abalone habitat impacted by urchins in < 25 m water depth using multibeam acoustic imagery. Detailed substrate type (Pavement Reef, Megaclast Reef, Mixed Consolidated Sediment/Reef and Sand), and kelp coverage maps have been produced for the east coast of Tasmania. Large urchin barrens have been predicted and the minimum quantifiable unit of which small incipient barrens can be detected has been identified using this acoustic water column technique. This data provides a snapshot of the 2021 distribution of seafloor habitats and associated vegetation distribution, and will assist in the facilitation of strategic decision making for urchin control and abalone management. Data for download has been split by fishing block (22-24, 27-30). This record describes *FISHING BLOCK 23*. The following data products are available for download, for each fishing block: • 50cm resolution bathymetry • 50cm resolution substrate type (Seamap Australia classification) • bathymetry derivatives (seabed slope, curvature, rugosity, 1 and 2m contours) • water column data - 1m mean signal • water column data - 9m2 raw block statistic • water column data - vegetation likelihood classification See associated records for access to data from other fishing blocks (22, 24, 27, 28, 29, 30).
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The principle aim of this project was to map the fine-scale spatial distribution of key abalone habitat impacted by urchins in < 25 m water depth using multibeam acoustic imagery. Detailed substrate type (Pavement Reef, Megaclast Reef, Mixed Consolidated Sediment/Reef and Sand), and kelp coverage maps have been produced for the east coast of Tasmania. Large urchin barrens have been predicted and the minimum quantifiable unit of which small incipient barrens can be detected has been identified using this acoustic water column technique. This data provides a snapshot of the 2021 distribution of seafloor habitats and associated vegetation distribution, and will assist in the facilitation of strategic decision making for urchin control and abalone management. Data for download has been split by fishing block (22-24, 27-30). This record describes *FISHING BLOCK 27*. The following data products are available for download, for each fishing block: • 50cm resolution bathymetry • 50cm resolution substrate type (Seamap Australia classification) • bathymetry derivatives (seabed slope, curvature, rugosity, 1 and 2m contours) • water column data - 1m mean signal • water column data - 9m2 raw block statistic • water column data - vegetation likelihood classification See associated records for access to data from other fishing blocks (22, 23, 24, 28, 29, 30).
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Raised features were derived by aggregating and dissolving the boundaries of the 1 degree S57 file series for the Australian continental shelf and Lord Howe Island shelf (200 m) depicting depth area features. An algorithm was applied to the data that isolated these features from surrounding lower features or plains.
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The principle aim of this project was to map the fine-scale spatial distribution of key abalone habitat impacted by urchins in < 25 m water depth using multibeam acoustic imagery. Detailed substrate type (Pavement Reef, Megaclast Reef, Mixed Consolidated Sediment/Reef and Sand), and kelp coverage maps have been produced for the east coast of Tasmania. Large urchin barrens have been predicted and the minimum quantifiable unit of which small incipient barrens can be detected has been identified using this acoustic water column technique. This data provides a snapshot of the 2021 distribution of seafloor habitats and associated vegetation distribution, and will assist in the facilitation of strategic decision making for urchin control and abalone management. Data for download has been split by fishing block (22-24, 27-30). This record describes *FISHING BLOCK 22*. The following data products are available for download, for each fishing block: • 50cm resolution bathymetry • 50cm resolution substrate type (Seamap Australia classification) • bathymetry derivatives (seabed slope, curvature, rugosity, 1 and 2m contours) • water column data - 1m mean signal • water column data - 9m2 raw block statistic • water column data - vegetation likelihood classification See associated records for access to data from other fishing blocks (23, 24, 27, 28, 29, 30).
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This dataset is a compilation product of all publicly available surveyed bathymetry within the Australian Marine Parks (AMPs, 2025 boundaries), merged into a single multi-resolution composite per AMP. The data was compiled by Seamap Australia as part of an Our Marine Parks (Parks Australia) project with funding from the Australian Government to improve knowledge relating to classification of the Australian Marine Parks real estate. This compilation of bathymetry data was the first step in generating geomorphometry classifications (see https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/40e9283b-d4ed-4176-8fe6-112b8697003f for derived geomorphometry maps). Bathymetry data was collated from AusSeabed data holdings (https://portal.ga.gov.au/persona/marine), the WA Bathymetry Portal (https://dot-wa.maps.arcgis.com/apps/webappviewer/index.html?id=d58dd77d85654783b5fc8c775953c69b), the Australian Ocean Data Network (https://portal.aodn.org.au/) and other existing public data repositories. A single multi-resolution bathymetry mosaic, and associated multi-resolution hillshade mosaic, was generated for each AMP. Data is supplied as a single Web Map Service of bathymetry on hillshade for the mapped regions. Data is available for download as (1) bathymetry, and (2) hillshade, Geotiff files for each AMP. The table below indicates the Parks included in this data package, and the percent coverage of bathymetric data for each. Parks not expressly listed below had no publicly accessible bathymetry data available from the sources listed in the 'lineage' section below. This dataset was last updated on 06/03/2025 and represents all public bathymetry data intersecting AMPs that could be located as of that date. PARK % COVERAGE Abrolhos 56% Apollo 62% Arafura 11% Argo-Rowley Terrace 34% Ashmore Reef 68% Beagle 56% Boags 31% Bremer 71% Carnarvon Canyon 82% Cartier Island 9% Central Eastern* 48% (42%) Christmas Island* 43% (41%) Cocos (Keeling) Islands* 25% (19%) Cod Grounds 97% Coral Sea* 100% (30%) Dampier 60% East Gippsland 100% Eastern Recherche 37% Eighty Mile Beach 69% Flinders 32% Franklin 51% Freycinet 59% Gascoyne 67% Geographe 25% Gifford* 100% (70%) Great Australian Bight 40% Gulf of Carpentaria 6% Heard & McDonald Islands*† 100% (0%) Hunter 90% Huon 95% Jervis 100% Jurien 18% Kimberley 14% Lord Howe* 16% (14%) Macquarie Island 48% Mermaid Reef 83% Montebello 89% Murray 50% Nelson 62% Ningaloo 55% Norfolk 42% Oceanic Shoals 23% Perth Canyon 100% Roebuck 100% Shark Bay 16% Solitary Islands 100% South Tasman Rise 82% South-west Corner 53% Tasman Fracture 99% Twilight 1% Two Rocks 32% Wessel 1% West Cape York 11% Western Eyre 27% Western Kangaroo Island 10% Zeehan 73% * indicates Digital Elevation Model (DEM) data was included in compilation. Coverage of surveyed (non-modelled) bathymetry is shown in parentheses () † has been included in analysis but is not an Australian Marine Park
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The CSIRO’s Oceans & Atmosphere Shallow Survey Internal Facility (SSIF) was contracted by the Institute for Marine and Antarctic Studies (IMAS) of the University of Tasmania (UTAS) in collaboration with Parks Australia, to undertake a hydrographic survey of the Boags Commonwealth Marine Reserve in the southwestern Bass Strait. This site was surveyed in conjunction with other smaller sites for Petuna Aquaculture, as part of a broader survey campaign. All of the sites covered in this campaign are located in the vicinity of the Hunter Group of Islands, off the north-western coast of Tasmania.
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The principle aim of this project was to map the fine-scale spatial distribution of key abalone habitat impacted by urchins in < 25 m water depth using multibeam acoustic imagery. Detailed substrate type (Pavement Reef, Megaclast Reef, Mixed Consolidated Sediment/Reef and Sand), and kelp coverage maps have been produced for the east coast of Tasmania. Large urchin barrens have been predicted and the minimum quantifiable unit of which small incipient barrens can be detected has been identified using this acoustic water column technique. This data provides a snapshot of the 2021 distribution of seafloor habitats and associated vegetation distribution, and will assist in the facilitation of strategic decision making for urchin control and abalone management. All spatial datasets and derivatives of the have been uploaded onto the Seamap Australia data portal for visualisation as a resource for both managers and scientists for further analysis and study. Data packages have been split by fishing block (22-24, 27-30) and are available to download from each of the 'child' records linked to this record (below).
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These contours are derived from the Australian Bathymetry and Topography Grid, June 2009 (Geoscience Australia).