Product catalogue
Darwin Harbour Habitat Mapping Program: High resolution backscatter grid
This resource contains a multibeam backscatter 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 backscatter 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.
Simple
Identification info
- Date (Creation)
- 2019-02-20
- Date (Publication)
- 2020-01-15T02:58:52
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/127102
Identifier
- Codespace
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Digital Object Identifier
- Cited responsible party
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Role Organisation / Individual Name Details Author Siwabessy, P.J.W.
- Status
- Completed
- Spatial representation type
Spatial resolution
- Level of detail
-
1m
- 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
-
Role Organisation / Individual Name Details Distributor Geoscience Australia
Voice
Resource format
- Title
-
Product data repository: Various Formats
- Website
-
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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Backscatter
-
- Keywords
-
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Marine Environmental Baselines
-
- Keywords
-
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Marine Survey
-
- Keywords
-
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Exclusive Economic Zone
-
- Keywords
-
-
Published_External
-
Resource constraints
- Title
-
Creative Commons Attribution 4.0 International Licence
- Alternate title
-
CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
-
Download the data (esri grid) [4.8 MB]
Download the data (esri grid) [4.8 MB]
- OnLine resource
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Download the data (jpg) [2 MB]
Download the data (jpg) [2 MB]
- OnLine resource
-
Download the data (kml) [3.6 MB]
Download the data (kml) [3.6 MB]
- OnLine resource
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Download the metadata (txt) [5 KB]
Download the metadata (txt) [5 KB]
- OnLine resource
-
Link to collection record
Link to collection record
Resource lineage
- Statement
-
This backscatter grid composed of multibeam sonar data from multiple surveys GA4425 in 2010, GA0333 in 2011, GA0351/SOL6187 in 2015, GA4452/SOL6432 in 2016, GA0361 in 2017 and GA0362 in 2017 and 2018. The first two surveys were acquired by Geoscience Australia (GA), Australian Institute of Marine Science (AIMS), Northern Territory Government’s Department of Environment and Natural Resources (NTG-DENR) and Darwin Port Authority using GA’s Kongsberg EM3002D multibeam echosounder from aboard MV Matthew Flinders and the last four surveys by GA, AIMS and NTG-DENR using GA’s Kongsberg EM2040C Dual multibeam echosounder from aboard RV Solander for the first two and using GA’s Kongsberg EM3002D from aboard MV Reelax and RV Capricornus for the last two respectively. These data were processed on the National Computational Infrastructure (NCI) supercomputer at the Australian National University using the CMST-GA MB Process v15.04.04.0 (64) toolbox software co-developed by the Centre for Marine Science and Technology (CMST) at Curtin University and GA (described in Gavrilov et al., 2005; Parnum and Gavrilov, 2011). The process involved removal of the system transmission loss, removal of the system model, calculation of the incidence angle, correction of the beam pattern, calculation of the angular backscatter response within a sliding window of 100 pings with a 50% overlap in a 1° bin, removal of the angular dependence, and restoration to the backscatter intensity at an angle of 40° (Siwabessy et al., 2015; 2016; 2017; 2018). The final processed data were gridded to 1 m horizontal resolution, then exported as gridded surface and converted to backscatter maps for further analysis in ArcGIS.
- 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
-
urn:uuid/ce7e651c-128b-4346-95f4-365c26d108fb
- Title
-
GeoNetwork UUID
Type of resource
- Resource scope
- Dataset
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/127102
- Metadata linkage
-
https://ecat.ga.gov.au/geonetwork/srv/eng//metadata/4b73f17b-a020-4c07-ad1b-63ad8640b114
- Metadata linkage
-
https://ecat.ga.gov.au/geonetwork/srv/eng//metadata/ce7e651c-128b-4346-95f4-365c26d108fb
- Date info (Creation)
- 2019-02-20T04:51:37
- Date info (Revision)
- 2019-02-20T04:51:37
Metadata standard
- Title
-
AU/NZS ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-3 (Draft Schemas 2015)
- Edition date
- 2015-07-01T00:00:00
- Title
-
Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
-
Version 2.0, April 2015