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Seabed morphology and geomorphology of the Coral Sea Marine Park, north-eastern Australia - Version 1

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Created 13/01/2025

Updated 13/01/2025

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This data product contains geospatial seabed morphology and geomorphology information for Flinders Reefs and Cairns Seamount (Coral Sea Marine Park). These maps are intended for use by marine park managers, regulators, the general 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, seabed sediment samples and sub-bottom profiles supplemented the bathymetry DEM and morphology classifications to inform the geomorphic interpretations.

The Flinders Reefs seabed morphology and geomorphology maps were derived from an 8 m horizontal resolution bathymetry DEM compiled from multibeam surveys (FK200429/GA4861: Beaman et al., 2020; FK200802/GA0365: Brooke et al, 2020), Laser Airborne Depth Sounder (LADS), Light Detection and Ranging (LiDAR) and bathymetry supplied by the Australian Hydrographic Office.

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 upper mesophotic zone).

The data product and application schema are fully described in the accompanying Data Product Specification.

Beaman, R., Duncan, P., Smith, D., Rais, K., Siwabessy, P.J.W., Spinoccia, M. 2020. Visioning the Coral Sea Marine Park bathymetry survey (FK200429/GA4861). Geoscience Australia, Canberra. https://dx.doi.org/10.26186/140048; GA eCat record 140048

Brooke, B., Nichol, S., Beaman, R. 2020. Seamounts, Canyons and Reefs of the Coral Sea bathymetry survey (FK200802/GA0365). Geoscience Australia, Canberra. https://dx.doi.org/10.26186/144385; GA eCat record 144385

Dove, D., Nanson, R., Bjarnadóttir, L. R., Guinan, J., Gafeira, J., Post, A., Dolan, Margaret F.J., Stewart, H., Arosio, R., Scott, G. (2020). A two-part seabed geomorphology classification scheme (v.2); Part 1: morphology features glossary. Zenodo. https://doi.org/10.5281/zenodo.4075248; GA eCat Record 144305

Huang, Z., Nanson, R. and Nichol, S. (2022). Geoscience Australia's Semi-automated Morphological Mapping Tools (GA-SaMMT) for Seabed Characterisation. Geoscience Australia, Canberra. https://dx.doi.org/10.26186/146832; GA eCat Record 146832

Nanson, R., Arosio, R., Gafeira, J., McNeil, M., Dove, D., Bjarnadóttir, L., Dolan, M., Guinan, J., Post, A., Webb, J., Nichol, S. (2023). A two-part seabed geomorphology classification scheme; Part 2: Geomorphology classification framework and glossary (Version 1.0) (1.0). Zenodo. https://doi.org/10.5281/zenodo.7804019; GA eCat Record 147818

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Title Seabed morphology and geomorphology of the Coral Sea Marine Park, north-eastern Australia - Version 1
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/dc7c89ba-4548-4bd6-bc0b-22ad66713ca1
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 08/06/2023
Geospatial Coverage {"type": "Polygon", "coordinates": [[[147.17, -17.95], [148.7, -17.95], [148.7, -16.52], [147.17, -16.52], [147.17, -17.95]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Seabed morphology and geomorphology of the Coral Sea Marine Park, north-eastern Australia - Version 1". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/seabed-morphology-and-geomorphology-of-the-coral-sea-marine-park-north-eastern-australia-versio

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