Bass Strait Sediment Grain Size Prediction Grids

These datasets describe sediment grain size properties at the Bass Strait region, Australia. They include six variables: <ul><li>mud content (mud_BS.tif), </li><li>sand content (sand_BS.tif), </li><li>gravel content (gravel_BS.tif), </li><li>sediment classes (folkClass_BS.tif), </li><li>mean grain size (MGS_mean_BS.tif and MGS_std_BS.tif), and</li><li> median grain size (d50_mean_BS.tif and d50_std_BS.tif). </li></ul>These grids were the results of the predictive modelling using machine learning models.  The inputs to the machine learning models include the sediment samples extracted from the Marine Sediments (MARS) database and a number of environmental and spatial variables. The environmental variables include bathymetry data and its derivatives, data indicating seabed shear stress and data extracted from hydrodynamic modelling. The details on data preparation, modelling and prediction processes can be found in the lineage information. The MGS_mean_BS.tif and d50_mean_BS.tif represent the averages of the three MGS grids and the three d50 grids from three different types of machine learning models, respectively. The MGS_std_BS.tif and d50_std_BS.tif represent the standard deviations of the three MGS grids and the three d50 grids from three different types of machine learning models, respectively. The standard deviation grids thus indicate the prediction uncertainties of these two variables. These datasets are part of the products delivered by the Resourcing Australia’s Prosperity Initiative (RAPi), under the National resource assessment component and the Offshore Energy Project.

Identification info

Date (Creation): 2026-06-19

Date (Publication): 2026-08-10T01:36:53.848Z

Citation identifier: Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/151229

Identifier

Code: 10.26186/151229

Codespace: doi.org

Description: Digital Object Identifier (DOI)

Cited responsible party

Role	Organisation / Individual Name	Details
Publisher	Geoscience Australia
Author	Huang, Z.	Place and Communities Division Internal Contact

Purpose: Australian Federal Government has declared two Declared Offshore Wind Areas in the Bass Strait region. The region also encompasses several Commonwealth marine parks. Maps of sediment grain size properties provide crucial insights into the distribution, stability and dynamics of seabed features and marine processes, including erosion and sediment transport patterns. This information is essential in planning offshore developments, preparing informed environmental impact assessments, and for the Department to assess potential impacts to Matters of National Environmental Significance so that sensitive sites can be avoided.

Status: Completed

Point of contact

Role	Organisation / Individual Name	Details
Point of contact	Commonwealth of Australia (Geoscience Australia)	Voice
Resource provider	Place and Communities Division	Internal Contact
Point of contact	Huang, Z.	Place and Communities Division Internal Contact

Spatial representation type

Topic category

Geoscientific information

Extent

Maintenance and update frequency: As needed

Resource format

Title: Product data repository: Various Formats

Protocol: FILE:DATA-DIRECTORY

Name of the resource: Data Store directory containing the digital product files

Description: Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

Keywords

Bass Strait

Keywords

Sediment

Keywords

machine learning

Keywords

Seabed Mapping

Project

Resourcing Australia's Prosperity
National resource assessments
Offshore Energy

theme.ANZRC Fields of Research.rdf

Marine Geoscience

theme.ANZRC Fields of Research.rdf

Geoinformatics

Keywords

Published_External

Resource constraints

Title: Creative Commons Attribution 4.0 International Licence

Alternate title: CC-BY

Edition: 4.0

Website

https://creativecommons.org/licenses/by/4.0/

Addressee

Role	Organisation / Individual Name	Details
User	Any

Use constraints: License

Use constraints: Other restrictions

Other constraints: © Commonwealth of Australia (Geoscience Australia) 2026

Resource constraints

Title: Australian Government Security Classification System

Edition date: 2018-11-01T00:00:00

Website

https://www.protectivesecurity.gov.au/pspf-annual-release

Classification: Unclassified

Classification system: Australian Government Security Classification System

Language: English

Character encoding: UTF8

Distribution Information

OnLine resource: Download the datasets (zip) [3.5 GB]

Download the datasets (zip) [3.5 GB]

Distribution format

Distribution Information

Distributor contact

Role	Organisation / Individual Name	Details
Distributor	Commonwealth of Australia (Geoscience Australia)	Voice

Resource lineage

Statement: <div class="ck-content">These grids of sediment grain size properties (%mud, %sand, %gravel, mean grain size, median grain size and Folk Classification) were predicted from sediment samples extracted from the MARS database and a number of environmental and spatial variables (e.g., predictors) using machine learning models. Three machine learning models from the DTREG software (<a href=" https://www.dtreg.com/">https://www.dtreg.com/</a>), Random Forest Decision Tree (RF), Support Vector Machine (SVM) and Generalised Regression Neural Network (GRNN), were used to develop the prediction models. The followings are the key steps for data preparation, modelling and prediction:<ol><li>Selected the MARS sediment samples within the Bass Strait region (905 valid samples)</li><li>Four groups of environmental and spatial variables were obtained and used as predictors (see table below). <ol><li>Bathymetry grid and its derivatives. The bathymetric grid used is the AusBathyTopo 2022 Bass Strait regional grid at a 30m spatial resolution (<a href=" https://pid.geoscience.gov.au/dataset/ga/147043">https://pid.geoscience.gov.au/dataset/ga/147043</a>). The derivatives include slope, eastness, topographic relief, and rugosity at multiple spatial scales.</li><li>GEOMACS variables indicating seabed shear stress (<a href=" https://pid.geoscience.gov.au/dataset/ga/71995">https://pid.geoscience.gov.au/dataset/ga/71995</a>; <a href=" https://pid.geoscience.gov.au/dataset/ga/77000">https://pid.geoscience.gov.au/dataset/ga/77000</a>; <a href=" https://pid.geoscience.gov.au/dataset/ga/77001">https://pid.geoscience.gov.au/dataset/ga/77001</a>; <a href=" https://pid.geoscience.gov.au/dataset/ga/77003">https://pid.geoscience.gov.au/dataset/ga/77003</a>).</li><li>Bottom current speed variables extracted from the BASS2 hydrodynamic modelling outputs. These datasets were provided by CSIRO under the GA/CSIRO data sharing agreement. </li><li>Spatial variables, including northing, easting, distance to coast, distance to continental shelf and distance to the region centre. </li></ol></li><li>Used the Random Forest to develop models for %mud, %sand and %gravel. The modelling results as follows:<ol><li>%mud: R2 = 0.51, Important variables (bathymetry, northing, easting and geomacs_pe)</li><li>%sand: R2 = 0.265, Important variables (bathymetry, easting, distCentre, northing, rel15, MUD, geomacs_pe, slp7 and speed_point05_per)</li><li>%gravel: R2 = 0.265, Important variables (bathymetry, easting, rel15, geomacs_ratio, MUD, geomacs_pe and speed_point05_per)</li></ol></li><li>Generated the prediction grids for %mud, %sand and %gravel.</li><li>Generated the Folk classification grid from the above three prediction grids using modified Folk classification rules below (Folk, 1980).<ol><li>If (%gravel > 80), Then Gravel</li><li>If (80 >= %gravel > 30) and (%sand to %mud ratio > 9), Then sandy Gravel</li><li>If (80 >= %gravel > 30) and (>= 9 %sand to %mud ratio > 1), Then muddy sandy Gravel</li><li>If (80 >= %gravel > 30) and (%sand to %mud ratio <= 1), Then muddy Gravel</li><li>If (30 >= %gravel > 5) and (%sand to %mud ratio > 9), Then gravelly Sand</li><li>If (30 >= %gravel > 5) and (>= 9 %sand to %mud ratio > 1), Then gravelly muddy Sand</li><li>If (30 >= %gravel > 5) and (%sand to %mud ratio <= 1), Then gravelly Mud</li><li>If (%gravel <= 5) and (%sand to %mud ratio > 9), Then Sand</li><li>If (%gravel <= 5) and (9 >= %sand to %mud ratio > 1), Then muddy Sand</li><li>If (%gravel <= 5) and (>= 1 %sand to %mud ratio > 0.111), Then sandy Mud</li><li>If (%gravel <= 5) and (%sand to %mud ratio <= 0.111), Then Mud</li></ol></li><li>Selected the MARS sediment samples with valid %mud, %sand, %gravel, mean grain size (MGS; measured using a combination of sieve and laser techniques) and median grain size (d50; measured using a combination of sieve and laser techniques) values. This results in 1749 samples. </li><li>Use the Random Forest, the Support Vector Machine and the Generalised Regression Neural Network to develop models for mean grain size using %mud, %sand and %gravel as predictors. The modelling results as follows:<ol><li>Random Forest: R2 = 0.82</li><li>Support Vector Machine: R2 = 0.79</li><li>Generalised Regression Neural Network: R2 = 0.87</li></ol></li><li>Generated three prediction grids of MGS. From them, generated mean grid of MGS and standard deviation grid of MGS.</li><li>Use the Random Forest, Support Vector Machine and Generalised Regression Neural Network to develop models for median grain size using %mud, %sand and %gravel as predictors. The modelling results as follows:<ol><li>Random Forest: R2 = 0.79</li><li>Support Vector Machine: R2 = 0.70</li><li>Generalised Regression Neural Network: R2 = 0.73</li></ol></li><li>Generated three prediction grids of d50. From them, generated mean grid of d50 and standard deviation grid of d50.</li></ol>Folk, Robert L. Petrology of sedimentary rocks. Hemphill publishing company, 1980. <figure class="table" style="float:left;"><table><tbody><tr><td style="border:1.0pt solid windowtext;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Variable Name</td><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:none;border-right-style:solid;border-top-style:solid;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Variable Description</td><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:none;border-right-style:solid;border-top-style:solid;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Variable Group</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">bathymetry</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">AusBathyTopo 2022 Bass Strait regional grid</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Bathymetry and Derivatives</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">eastness3, eastness7, eastness11, eastness15,</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Topographic aspect indicating eastness at four scales</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Bathymetry and Derivatives</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">slp3, slp7, slp11, slp15</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Slope gradient at four scales</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Bathymetry and Derivatives</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">rug3, rug7, rug11, rug15</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Seabed rugosity at four scales</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Bathymetry and Derivatives</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">rel3, rel7, rel11, rel15</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Topographic relief at four scales</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Bathymetry and Derivatives</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">geomacs_gmean</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Mean seabed shear stress</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">GEOMACS outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">geomacs_excee</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Percentage of time the seabed shear stress exceeds 0.4 pa</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">GEOMACS outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">geomacs_ratio</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">The integrated seabed shear stress exceeding 0.4 pa divided by theintegrated total seabed shear stress</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">GEOMACS outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">geomacs_pe</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">percentage of time the Shield's parameter exceeds 0.25</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">GEOMACS outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">geomacs_r</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">The integrated Shields parameter exceeding 0.25 divided by theintegrated total Shields parameter</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">GEOMACS outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">geomacs_ri</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Average time between events when the Shields parameter exceeds 0.25based on a POT analysis</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">GEOMACS outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">geomacs_ed</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Ecological disturbance index</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">GEOMACS outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">speed_mean</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Bottom current speed: overall temporal mean between 2017 and 2023</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Hydrodynamic modelling outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">speed_std</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Bottom current speed: temporal standard deviation between 2017 and 2023</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Hydrodynamic modelling outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">speed_75th</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">The 25th percentile of the bottom current speed between 2017 and 2023</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Hydrodynamic modelling outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">speed_point05_per</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Percentage of time the bottom current speed exceeding 0.05 m/s between 2017 and 2023</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Hydrodynamic modelling outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">speed_pointone_per</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Percentage of time the bottom current speed exceeding 0.1 m/s between 2017 and 2023</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Hydrodynamic modelling outputs</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">easting</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Geographic coordinate on the east-west direction</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Spatial variables</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">northing</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Geographic coordinate on the north-south direction</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Spatial variables</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">distCoast1</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Distance to coastline (exclude large islands)</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Spatial variables</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">distCoast2</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Distance to coastline (include large islands)</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Spatial variables</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">distShelf1</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Distance to continental shelf break</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Spatial variables</td></tr><tr><td style="border-bottom-style:solid;border-color:windowtext;border-left-style:solid;border-right-style:solid;border-top-style:none;border-width:1.0pt;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">distCentre</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.25pt;">Distance to the centre of the study region</td><td style="border-bottom:1.0pt solid windowtext;border-left-style:none;border-right:1.0pt solid windowtext;border-top-style:none;padding:0cm 5.4pt;vertical-align:top;width:150.3pt;">Spatial variables</td></tr></tbody></table></figure> </div>

Reference System Information

Identifier

Code: 32755

Codespace: EPSG

Version: 12

Description: WGS84 / UTM zone 55S (EPSG:32755)

Reference system type: Projected

Metadata constraints

Title: Australian Government Security Classification System

Edition date: 2018-11-01T00:00:00

Website

https://www.protectivesecurity.gov.au/pspf-annual-release

Classification: Unclassified

Metadata

Metadata identifier

urn:uuid/5a859a14-2c7a-4b5b-ae23-f95e15ef7289

Title: GeoNetwork UUID

Language: English

Character encoding: UTF8

Contact

Role	Organisation / Individual Name	Details
Point of contact	Commonwealth of Australia (Geoscience Australia)	Voice
Owner	Huang, Z.	Place and Communities Division Internal Contact
Point of contact	Huang, Z.	Place and Communities Division Internal Contact

Type of resource

Resource scope: Dataset

Name: Dataset

Alternative metadata reference

Title: Geoscience Australia - short identifier for metadata record with uuid

Citation identifier: eCatId/151229

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/api/records/5a859a14-2c7a-4b5b-ae23-f95e15ef7289

Date info (Creation): 2026-08-10T01:49:38.554Z

Date info (Creation): 2026-06-19T04:11:32.092Z

Date info (Revision): 2026-08-10T01:50:05.764Z

Metadata standard

Title: AU/NZS ISO 19115-1:2014

Metadata standard

Title: ISO 19115-1:2014

Metadata standard

Title: ISO 19115-3

Title: Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition: Version 2.0, September 2018

Citation identifier: https://pid.geoscience.gov.au/dataset/ga/122551

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