Outer Darwin Harbour Marine Survey 2015: High resolution bathymetry grid

This resource contains bathymetry data for Outer Darwin Harbour collected by Geoscience Australia (GA), the Australian Institute of Marine Science (AIMS) and the Northern Territory Government (Department of Land Resource Management) during the period from 28 May and 23 June 2015 on the RV Solander (survey SOL6187/GA0351). This project was made possible through offset funds provided by INPEX-led Ichthys LNG Project to Northern Territory Government Department of Land Resource Management, and co-investment from Geoscience Australia and Australian Institute of Marine Science. The intent of this four year (2014-2018) 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 that underpin marine resource management decisions. The specific objectives of the survey were to: 1. Obtain high resolution geophysical (bathymetry) data for outer Darwin Harbour, including Shoal Bay; 2. Characterise substrates (acoustic backscatter properties, grainsize, sediment chemistry) for outer Darwin Harbour, including Shoal Bay; and 3. Collect tidal data for the survey area. Data acquired during the survey included: multibeam sonar bathymetry and acoustic backscatter; physical samples of seabed sediments, underwater photography and video of grab sample locations and oceanographic information including tidal data and sound velocity profiles. This dataset comprises multibeam bathymetry surface grid. A detailed account of the survey is provided in: Siwabessy, P.J.W., Smit, N., Atkinson, I., Dando, N., Harries, S., Howard, F.J.F., Li, J., Nicholas, W.A., Potter, A., Radke, L.C., Tran, M., Williams, D. and Whiteway, T., 2015. Outer Darwin Harbour Marine Survey 2015: GA0351/SOL6187 Post-survey report. Record 2016/008. Geoscience Australia, Canberra. http://dx.doi.org/10.11636/Record.2016.008<p><p>This dataset is not to be used for navigational purposes.

Identification info

Date (Creation): 2015-05-01T00:00:00

Date (Publication): 2016-06-22T15:00:00

Citation identifier: Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/100093

Cited responsible party

Role	Organisation / Individual Name	Details
Author	Siwabessy, J.	1
Author	Tran, M.	2
Author	Howard, F.J.F.	3
Author	Smit, N.	4
Author	Williams, D.K.	5
Author	Dando, N.	6
Author	Atkinson, I.	7
Author	Harries, S.	8
Owner	Australian Institute of Marine Science	Voice
Owner	Northern Territory Department of Land Resource Management	Voice
Owner	Commonwealth of Australia (Geoscience Australia)	Voice

Status

Point of contact

Role	Organisation / Individual Name	Details
Custodian	Siwabessy, P.J.W. Commonwealth of Australia (Geoscience Australia)	Voice
Owner	Northern Territory Department of Land Resource Management Commonwealth of Australia (Geoscience Australia)	Voice Voice
Owner	Australian Institute of Marine Science Commonwealth of Australia (Geoscience Australia)	Voice Voice
Owner	Commonwealth of Australia (Geoscience Australia) Commonwealth of Australia (Geoscience Australia)	Voice Voice

Spatial representation type: Grid

Spatial resolution

Level of detail: 1m

Topic category

Geoscientific information

Extent

Temporal extent

Time period: 2015-05-28 2015-06-23

Extent

Maintenance and update frequency: As needed

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

Australian and New Zealand Standard Research Classification: Fields of Research

Earth Sciences

{1}

HVC_144641

Project

AusSeabed

{1}

Bathymetry

{1}

Marine Environmental Baselines

{1}

Marine Survey

{1}

Exclusive Economic Zone

{1}

Published_External

Resource constraints

Title: Creative Commons Attribution 4.0 International Licence

Alternate title: CC-BY

Edition: 4.0

Website

http://creativecommons.org/licenses/

Access constraints: License

Use constraints: License

Resource constraints

Title: Australian Government Security ClassificationSystem

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

Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

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 (caris csar)

Download the data (caris csar)

OnLine resource: Download the data (esri ascii)

Download the data (esri ascii)

OnLine resource: Download the data (esri grid)

Download the data (esri grid)

OnLine resource: Download the data (kml)

Download the data (kml)

OnLine resource: Download the data (xyz ascii)

Download the data (xyz ascii)

OnLine resource: Link to collection record

Link to collection record

OnLine resource: Darwin Harbour Bathymetry 2015 1m (zip) [2.6 GB]

Darwin Harbour Bathymetry 2015 1m (zip) [2.6 GB]

Distribution format

zip

File decompression technique

unzip

Resource lineage

Statement

The Outer Darwin Harbour Marine Survey 2015, GA-0351 SOL6187 was acquired by Geoscience Australia (GA) in collaboration with the Australian Institute of Marine Science (AIMS) and Department of Land Resource Management (Northern Territory Government) onboard the RV Solander between 28 May and 23 June 2015.

The AIMS Cruise Leader was Mr. David Williams, the NTGov Chief Investigator onboard was Dr. Neil Smit, and the GA Survey Leader was Dr. Justy Siwabessy.

This dataset was acquired and processed onboard and in the office by Justy Siwabessy using CARIS HIPS & SIPS ver 8.1.13.

Processing:

1. First a vessel configuration file was created where the co-ordinates of the motion sensor and DGPS antenna and patch test offsets were recorded.

2. A new project was then created and the vessel configuration file was attached to the project file.

3. The raw swath sonar data, in raw.all format, for each line was then imported into the project and the vessel information assigned to the data.

4. The motion sensor, DGPS and heading data were then cleaned using a filter that averaged adjacent data to remove artefacts.

5. Different sound velocity profiles data for each block were attached to the corresponding raw swath sonar data files to correct the depths for changes in the speed of sound through the water column.

6. Then a new blank field area was defined that specified the geographic area of study and the co-ordinate system used. The co-ordinates for the study areas were WGS84 UTM-52S.

7. The data was cleaned by applying several filters including surface filters to remove spikes in the data. A manual inspection of the data was undertaken as required using Subset Editor module in Caris HIPS/SIPS software.

8. All the data for each bathymetric, motion sensor, DGPS, heading, tide and sound velocity profile data were merged to produce the final processed data file. A weighted grid of the processed data was then created for each Block.

In GA, the tide was applied to the grid to correct for tidal variations and velocity corrections were performed to correct for different artefacts and mismatches.

9. The processed data was finally exported as grids in the optimum resolution the data can provide with reference to EGM2008 vertical datum (~ mean sea level).

Metadata:

The multibeam bathymetry was acquired by the following survey:

- Survey Name: Outer Darwin Harbour Marine Survey 2015 (GA-0351/SOL6187)

- Vessel Name: RV Solander

- Institutions: Geoscience Australia, AIMS, NTGov

- Country: Australia

- Operator: AIMS

- Multibeam system: Kongsberg EM2040C (dual)

- Year of installation: 2014

- Nominal sonar frequency: 300 kHz

- Number of beams: 800 beams

- Beamwidth across track: 1.3 degrees

- Beamwidth along track: 1.3 degrees

- Pulse length: variable

- Selectable depth range: 10 m - 50 m

- Vessel speed: 7 - 10 knots

- Start Date: 28/05/2015

- End Date: 23/06/2015

- Start Port: Darwin

- End Port: Darwin

- Grid resolution: 1 m

- Number of grids: 1

- Total surface coverage: 713.31 km2

- Vertical Datum: MSL

- Horizontal Datum: WGS84 UTM-52S

- Use Limitation: This dataset is not to be used for navigational purposes.

Hierarchy level: Dataset

Reference System Information

Reference system identifier

CRS/WGS84 (CRS:84)

Title: European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication): 2008-11-12T00:00:00

Cited responsible party

Role	Organisation / Individual Name	Details
	European Petroleum Survey Group	http://www.epsg-registry.org/

Hierarchy level: Collection hardware

Platform

Identifier

Code: RV Solander

Instrument

Identifier

Code: Kongsberg EM2040C (300 kHz)

Metadata constraints

Title: Australian Government Security ClassificationSystem

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

Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification: Unclassified

Metadata

Metadata identifier

urn:uuid/835497db-9f8a-4f62-ac1e-b9452c7ddbeb

Title: GeoNetwork UUID

Language: English

Character encoding: UTF8

Contact

Role	Organisation / Individual Name	Details
Author	Siwabessy, P.J.W. Commonwealth of Australia (Geoscience Australia)	Voice

Role

Organisation / Individual Name

Details

Author

Siwabessy, P.J.W.

Commonwealth of Australia (Geoscience Australia)

Voice

Type of resource

Resource scope: Dataset

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier: eCatId/100093

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/835497db-9f8a-4f62-ac1e-b9452c7ddbeb

Date info (Creation): 2016-04-29T12:34:34

Date info (Revision): 2018-04-22T08:34:31

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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