Seabed morphology and geomorphology of Zeehan Marine Park, south-eastern Australia - Version 1

• Other Authors: Carroll, A. (author), Commonwealth of Australia (Geoscience Australia) (distributor), Huang, Z. (author), Manager Client Services (publisher), Manager Client Services (pointOfContact), McNeil, M. (author), McNeil, M. (pointOfContact), Nanson, R. (pointOfContact), Nanson, R. (author), Place and Communities Division (resourceProvider)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: geoscientificInformation; Parks Australia; seabed; morphology; geomorphology; spatial; mapping; marine; Geomorphology and earth surface processes; Published_Internal; Antarc*; Antarctic; Institute for Marine and Antarctic Studies
• Online Access: https://researchdata.edu.au/seabed-morphology-geomorphology-version-1/2922259; https://pid.geoscience.gov.au/dataset/ga/148620; https://doi.org/10.26186/148620

Maintenance and Update Frequency: notPlanned Statement: Underlying source bathymetric data were obtained from the University of Tasmania Institute for Marine and Antarctic Studies (Davey et al., 2022). Morphology and geomorphology data layers were produced by applying semi-automated mapping tools to bathymetry digital elevation models (DEMs) in a GIS environment (ESRI ArcGIS Pro) using a two-step approach. 1. Seabed morphology features were defined by generating polygons around topographic high, low, and planar features using the TPI (topographic position index) tool in GA-SaMMT (Geoscience Australia semi-automated morphology mapping tools: Huang et al., 2022). Where appropriate, manual editing was also employed to modify the polygon boundaries of some features. Features were then classified by computing a set of quantitative geometric attributes and applying published Morphology Features glossary terms (Dove et al., 2020) using the GA-SaMMT. It should be noted that features of a certain size threshold or height (determined by the horizontal and vertical resolution of the underlying bathymetry grid) may not be captured by the semi-automated mapping tools. In addition, features that fall outside of the optimal user-defined parameters for the input data are not captured in the output. 2. Seabed geomorphology was interpreted by applying additional datasets and domain knowledge to inform the geomorphic characterisation of the seabed following Nanson et al., (2023). Additional datasets available to inform this data product were multibeam backscatter and a survey report (unpublished) that included some seabed images. Where a geomorphology classification has not been attributed, the following notation was applied: NA: Classification at this level is not appropriate/applicable to the Setting/Process, or the level of detail is out of scope and has not been attempted; Unknown: There is insufficient data available to determine a geomorphology classification for a mapped Morphology Feature . A full list of GIS feature ...