Darwin Harbour Habitat Mapping Program: Predicted seabed mud content
This resource contains a predicted seabed mud content grid for the greater Darwin Harbour region as part of a baseline seabed mapping program of Darwin Harbour and Bynoe Harbour. This project was funded through offset funds provided by an INPEX-led Ichthys LNG Project to the Northern Territory Government's Department of Environment and Natural Resources (NTG-DENR) with co-investment from Geoscience Australia (GA) and the Australian Institute of Marine Science (AIMS). The intent of this program is to improve knowledge of the marine environments in the Darwin and Bynoe Harbour regions by collating and collecting baseline data that enable the creation of thematic habitat maps and information to underpin marine resource management decisions. The predicted seabed mud content grid was derived from a compilation of multiple surveys undertaken by GA, AIMS and NTG-DENR between 2011 and 2017, including GA0333 (Siwabessy et al., 2015), GA0341 (Siwabessy et al., 2015), GA0351/SOL6187 (Siwabessy et al., 2016), GA4452/SOL6432 (Siwabessy et al., 2017), GA0356 (Radke et al., 2017), and GA0358 and GA0359 (Radke et al., 2018), adding to those from a previous survey GA0333 collected by GA, AIMS and NTG-DENR. This dataset provides spatially continuous predictions of seabed %mud (< 63 µm) content for the Darwin and Bynoe harbour region, northern Australian marine margin. Data are presented in 10 m resolution raster grids format and ascii text file. Predictions are based on 395 samples and nine environmental variables derived from high resolution multibeam sonar bathymetry and backscatter data. Accuracy of predictions is very high, with a VEcv = 62% for mud; and the predictive accuracy has been increased by 198.3% for mud in comparison with the commonly used method (i.e., IDW). Absences in predictions occur in this dataset as a result of non-availability associated with predictive variables. This dataset supersedes previous predictions of mud content for the Darwin and Bynoe harbour region with demonstrated improvements in predictive accuracy.
Simple
Identification info
- Date (Creation)
- 2019-12-03
- Date (Publication)
- 2020-01-15T03:04:25
- Citation identifier
- ga-dataSetURI/https://pid.geoscience.gov.au/dataset/ga/127108
- Cited responsible party
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Role Organisation / Individual Name Details Author Li, J.
- Status
- Completed
- Spatial representation type
Spatial resolution
- Level of detail
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10 m
- Topic category
-
- Geoscientific information
Extent
Temporal extent
- Time period
- 2011 2017
Extent
))
- Maintenance and update frequency
- As needed
Resource format
- Title
-
Administration to complete
- Date
- Edition
-
Administration to complete
- Distributor contact
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Role Organisation / Individual Name Details Distributor Geoscience Australia
Voice
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- Keywords
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seabed
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- Keywords
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mud content
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- Keywords
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Darwin Harbour
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- Keywords
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Habitat Mapping
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
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Download the data (csv) [166 MB]
Download the data (csv) [166 MB]
- OnLine resource
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Download the data (esri ascii) [33.5 MB]
Download the data (esri ascii) [33.5 MB]
- OnLine resource
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Download the data (esri grid) [52.4 MB]
Download the data (esri grid) [52.4 MB]
- OnLine resource
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Link to collection record
Link to collection record
Resource lineage
- Statement
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Sediment samples were exported from Geoscience Australia’s Marine Sediments database (MARS). These samples and relevant high resolution multibeam sonar bathymetry and backscatter data were collected during marine surveys GA0356 (Radke et al., 2017), GA0358 and GA0359 (Radke et al., 2018), GA0351/SOL6187 (Siwabessy et al., 2016) and GA4452/SOL6432 (Siwabessy et al., 2017). Predicting the spatial distribution of mud content at 10 m resolution was undertaken using the average of the hybrid method of random forest and ordinary kriging (rfok) and the hybrid method of random forest and inverse distance weighting (RFOKRFIDW). All predictions were generated using the R package, spm (Li, 2018). The spatial predictive models used were selected from the methods in spm based on their predictive accuracy for each sediment type. This dataset is published with the permission of the CEO, Geoscience Australia.
References:
Li, J., 2018. spm: Spatial Predictive Modelling. R package version 1.1.0. https://CRAN.R-project.org/package=spm.
Radke, L., Smit, N., Li, J., Hunt-Lew Fatt, K., Harries, S., Windsor, J., Nicholas, T., 2018. Benthic Sediment surveys of inner Darwin Harbour and shallow water areas in and around Bynoe Harbour (2018) - GA0358 and GA0359 – Post-survey report.
Radke, L., Smit, N., Li, J., Nicholas, T., Picard, K., 2017. Outer Darwin Harbour Shallow Water Sediment Survey 2016: GA0356 – Post-survey report: Record 2017/06. Geoscience Australia, Canberra. http://dx.doi.org/10.11636/Record.2017.006.
Siwabessy, J., Smit, N., Atkinson, I., dando, N., Harries, S., Howard, F.J.F., Li, J., Nicholas, W.A., Potter, A., Radke, L., Tran, M., Williams, D., Whiteway, T., 2016. Outer Darwin Harbour Marine Survey 2015: GA0351/SOL6187 Post-survey report: Geoscience Australia Record 2018/08. Geoscience Australia, Canberra, ACT, Australia., p. 117.
Siwabessy, P.J.W., Smit, N., Atkinson, I., Dando, N., Harries, S., Howard, F.J.F., Li, J., Nicholas, W.A., Picard, K., Radke, L.C., Tran, M., Williams, D., Whiteway, T., 2017. Bynoe Harbour Marine Survey 2016: GA4452/SOL6432 – Post-survey report. Record 2017/04. Geoscience Australia, Canberra. http://dx.doi.org/10.11636/Record.2017.004.
- Hierarchy level
- Dataset
Reference System Information
- Reference system identifier
- EPSG/WGS 84 / UTM zone 52S (EPSG:32752)
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/b6a63d11-e4f3-4cb8-b29b-59ef8e98fcd4
- Title
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GeoNetwork UUID
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/127108
- Metadata linkage
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https://ecat.ga.gov.au/geonetwork/srv/eng//metadata/b6a63d11-e4f3-4cb8-b29b-59ef8e98fcd4
- Date info (Creation)
- 2019-02-20T05:08:19
- Date info (Revision)
- 2019-02-20T05:08:19
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3 (Draft Schemas 2015)
- Edition date
- 2015-07-01T00:00:00
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, April 2015