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This data product contains geospatial seabed morphology and geomorphology information for the Coral Sea Marine Park (Flinders Reef and Cairns Seamount) and is intended for use by Park managers, regulators, the public and other stakeholders. A nationally consistent two-part (two-step) seabed geomorphology classification system was used to map and classify the distribution of key seabed features. In step 1 semi-automated GIS mapping tools (GA-SaMMT; Huang et al., 2022; eCat Record 146832) were applied to a bathymetry digital elevation model (DEM) in a GIS environment (ESRI ArcGIS Pro) to map polygon extents (topographic high, low, and planar) and to quantitatively characterise their geometries. Their geometric attributes were then used to classify each shape into discrete Morphology Feature types (Part 1: Dove et al., 2020; eCat Record 144305). In step 2, the seabed geomorphology was interpreted by applying additional datasets and domain knowledge to inform their geomorphic characterisation (Part 2: Nanson et al., 2023; eCat Record 147818). Where available, backscatter intensity, seabed imagery (AUV and ROV), seabed samples, sub-bottom profiles and survey reports supplement the bathymetry DEM and morphology classifications to inform the geomorphic interpretations.<\/SPAN><\/SPAN><\/P>

The Flinders Reef seabed morphology and geomorphology features are derived from an 8m horizontal resolution bathymetry DEM compiled from multibeam surveys (FK200429/GA4861, eCat Record 140048; FK200802/GA0365, eCat Record 144385) and Laser Airborne Depth Sounder (LADS) lidar bathymetry supplied by the Australian Hydrographic Office.<\/SPAN><\/SPAN>A subset of the FK200802/GA0365 multibeam survey was gridded at 1 m horizontal resolution to derive the key morphology and geomorphology features at the top of Cairns Seamount (-35 to -66 m) within the mesophotic zone.<\/SPAN><\/SPAN><\/P>

The data product and application schema are fully described in the accompanying Data Product Specification. The product is accessible as GIS feature layers within a file geodatabase, GeoPackage, and as a web map service via the AusSeabed marine data portal.<\/SPAN><\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 4326, "latestWkid": 4326, "xyTolerance": 8.983152841195215E-9, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -400, "falseY": -400, "xyUnits": 9.999999999999999E8, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 }, "copyrightText": "Commonwealth of Australia (Geoscience Australia)\n\nMcNeil, M., Huang, Z., Nanson, R., Wenderlich, M., Carroll, A. Seabed morphology and geomorphology features of the Coral Sea Marine Park. 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