Data

Predicted seabed gravel, mud and sand content in the Vlaming sub-basin in the Australian continental EEZ 2013

Geoscience Australia
Li, J.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://pid.geoscience.gov.au/dataset/ga/79352&rft.title=Predicted seabed gravel, mud and sand content in the Vlaming sub-basin in the Australian continental EEZ 2013&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/79352&rft.description=This dataset provides the spatially continuous data of seabed gravel (sediment fraction >2000 µm), mud (sediment fraction < 63 µm) and sand content (sediment fraction 63-2000 µm) expressed as a weight percentage ranging from 0 to 100%, presented in 0.0025 decimal degree (dd) resolution raster grids format and ascii text file. The dataset covers the Vlaming sub-basin in the Australian continental EEZ. This dataset supersedes previous predictions of sediment gravel, mud and sand content for the basin with demonstrated improvements in accuracy. Accuracy of predictions varies based on density of underlying data and level of seabed complexity. Artefacts occur in this dataset as a result of insufficient samples in relevant regions. This dataset is intended for use at the basin scale. The dataset may not be appropriate for use at smaller scales in areas where sample density is insufficient to detect local variation in sediment properties. To obtain the most accurate interpretation of sediment distribution in these areas, it is recommended that additional samples be collected and interpolations updated.Maintenance and Update Frequency: notPlannedStatement: Sediment samples were exported from Geoscience Australia's Marine Sediments database (MARS), an Oracle database developed by Geoscience Australia in line with ANZLIC data standards. A subset of this data was selected for use in predicting spatial distribution of gravel, mud and sand content based on a set of data quality control criteria (see Li et al. 2010 and 2012). Predicting the spatial distribution of gravel, mud and sand content at a 0.0025 decimal degree resolution was undertaken using a combined method of random forest and ordinary kriging (see Li et al. 2010, 2011 and 2012). The spatial interpolation method used was experimentally selected from over 40 methods/sub-methods based on assessment of predictive errors (Li et al. 2010, 2011 and 2012) and was refined for gravel, mud and sand respectively based on further experimental testing during March 2013. The predictions in raster grids and ascii text file were generated in R. Final file is in WGS 84 coordinate system with a 0.0025 dd spatial resolution. File sizes are approximately 22 MB (raster grids) and 50 MB (ascii text) for each sediment type (i.e., gravel, mud and sand), with data dimensions of 1800 (row) x 809 (column) and 1456200 (cell).&rft.creator=Li, J. &rft.date=2014&rft.coverage=westlimit=113.75098; southlimit=-34.251141; eastlimit=115.77348; northlimit=-29.751141&rft.coverage=westlimit=113.75098; southlimit=-34.251141; eastlimit=115.77348; northlimit=-29.751141&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/&rft_rights=Australian Government Security ClassificationSystem https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_subject=geoscientificInformation&rft_subject=Data Package&rft_subject=marine&rft_subject=AU-EEZ&rft_subject=EARTH SCIENCES&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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https://www.protectivesecurity.gov.au/Pages/default.aspx

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Brief description

This dataset provides the spatially continuous data of seabed gravel (sediment fraction >2000 µm), mud (sediment fraction < 63 µm) and sand content (sediment fraction 63-2000 µm) expressed as a weight percentage ranging from 0 to 100%, presented in 0.0025 decimal degree (dd) resolution raster grids format and ascii text file. The dataset covers the Vlaming sub-basin in the Australian continental EEZ. This dataset supersedes previous predictions of sediment gravel, mud and sand content for the basin with demonstrated improvements in accuracy. Accuracy of predictions varies based on density of underlying data and level of seabed complexity. Artefacts occur in this dataset as a result of insufficient samples in relevant regions. This dataset is intended for use at the basin scale. The dataset may not be appropriate for use at smaller scales in areas where sample density is insufficient to detect local variation in sediment properties. To obtain the most accurate interpretation of sediment distribution in these areas, it is recommended that additional samples be collected and interpolations updated.

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Maintenance and Update Frequency: notPlanned
Statement: Sediment samples were exported from Geoscience Australia's Marine Sediments database (MARS), an Oracle database developed by Geoscience Australia in line with ANZLIC data standards. A subset of this data was selected for use in predicting spatial distribution of gravel, mud and sand content based on a set of data quality control criteria (see Li et al. 2010 and 2012). Predicting the spatial distribution of gravel, mud and sand content at a 0.0025 decimal degree resolution was undertaken using a combined method of random forest and ordinary kriging (see Li et al. 2010, 2011 and 2012). The spatial interpolation method used was experimentally selected from over 40 methods/sub-methods based on assessment of predictive errors (Li et al. 2010, 2011 and 2012) and was refined for gravel, mud and sand respectively based on further experimental testing during March 2013. The predictions in raster grids and ascii text file were generated in R. Final file is in WGS 84 coordinate system with a 0.0025 dd spatial resolution. File sizes are approximately 22 MB (raster grids) and 50 MB (ascii text) for each sediment type (i.e., gravel, mud and sand), with data dimensions of 1800 (row) x 809 (column) and 1456200 (cell).

Issued: 2014

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115.77348,-29.75114 115.77348,-34.25114 113.75098,-34.25114 113.75098,-29.75114 115.77348,-29.75114

114.76223,-32.001141

text: westlimit=113.75098; southlimit=-34.251141; eastlimit=115.77348; northlimit=-29.751141

Subjects
AU-EEZ | Data Package | Earth Sciences | Published_External | geoscientificInformation | marine |

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Other Information
Link to Underwater video footage from the Vlaming Sub-basin (GA334) (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/74276

Link to Seabed Environments and Shallow Geology of the Vlaming Sub-Basin, Western Australia - Supporting Investigation for Geological Storage of CO2 GA334 Marine Environmental Survey Post-Survey Report (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/74626

Link to GA0334 Vlaming sub-basin Species identification of worms from grab (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/76463

Link to Vlaming Sub-Basin Marine Environmental Survey (GA-0334/S. Supporter GP1373)(NCIP Program) - High Resolution Bathymetry grids (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/78540

Link to Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia: Chlorin analyses of seabed sediments. (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/78550

Link to Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia: Inorganic elements of seabed sediments. (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/78551

Link to Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia: Bulk organic carbon and nitrogen isotopes and concentrations in seabed sediments. (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/78552

Link to Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia: Sediment oxygen demand of seabed sediments. (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/78553

Link to Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia: Chlorophyll a, b and c of seabed sediments. (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/78564

Link to Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia: %carbonate and specific surface area of seabed sediments. (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/78565

Link to Seabed Environments and shallow sub-surface geology of the Vlaming Sub-basin, offshore Perth Basin: Summary results from marine survey GA0334 (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/78846

Link to Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia: Grain size and carbonate concentrations of seabed sediment. (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/79176

Link to An Integrated Study of the CO2 Storage Potential in the Offshore Vlaming Sub-Basin: Results of the study undertaken as part of the NCIP program (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/79332

Link to Ecology / Infaunal morphospecies identifications from the Vlaming Sub-basin (GA0334) (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/79345

Link to Seabed environments and shallow geology of the Vlaming sub-basin, Western Australia - interpreted geomorphic map. (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/79578

Link to Vlaming Sub-Basin Marine Environmental Survey (GA-0334/S. Supporter GP1373)(NCIP Program) - High Resolution Backscatter grids (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/82975

Link to Vlaming Sub-Basin Marine Environmental Survey (GA-0334/S. Supporter GP1373)(NCIP Program) - Sidescan grids (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/82976

Link to Processed sub-bottom profiler data - Seabed environments and shallow geology of the Vlaming Sub-basin, offshore Perth Basin (GA0334) (Related Product)

uri : https://pid.geoscience.gov.au/dataset/ga/83724

Link to Data and information on seabed environments of the Vlaming sub-basin, Western Australia. (Related Product)

uri : 'https://pid.geoscience.gov.au/dataset/ga/79348

Download the data (zip) (File download)

uri : https://d28rz98at9flks.cloudfront.net/79352/Predicted_sediments_in_Vlaming.zip

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