| Field | Value |
|---|---|
Title |
NESP Biodiversity Hub Hunter Marine Park Multi Beam Echo Sounder Surveys |
Alternative title(s) |
NESP Biodiversity Hub D3 Project: bathymetry and backscatter of the seabed in the Hunter Marine Park |
Abstract |
Gridded multi-beam echousounder (MBES) bathymetry data for Hunter Marine Park acquired using NSW Department of Planning Industry and Environment MBES system aboard RV Bombora for the National Environmental Science Program (NESP Biodiversity Hub). Fieldwork was funded, both cash and in-kind, by NSW DPIE and NESP in Year 1 (2015) and 4 (2018) of the D3 Project. Initial surveys (2015) were exploratory as long-lines across the inner Special Purpose Zone (trawl) over the continental shelf with later surveys (2018) focused on 100% coverage over areas previously identified as containing the Key Ecological Feature ‘Continental Shelf Reef’. Reports by Davies et al (2016) 'Mapping Shelf Rocky Reef Habitats in the Hunter Commonwealth Marine Reserve', National Environmental Science Program Biodiversity Hub D3 Project –Evaluating and monitoring the status of marine biodiversity assets on the continental shelf; and Williams et al (2020) 'Mapping and characterising reef habitat and fish assemblages of the Hunter Marine Park', Project D3- Preparing for and implementing monitoring of CMR’s and the status of marine biodiversity assets on the continental shelf, Milestone Report December 2020; detail these MBES surveys as well as towed underwater video and BRUVs, to characterise seabed habitats, fish and sessile invertebrate assemblages of the Hunter Marine Park. Reports are available at https://www.nespmarine.edu.au/publications. Survey sites for focused mapping in 2018-19 were 1) 3-6 NM east and south-east of Seal Rocks - Sugarloaf Point, 2) Outer Gibber - a feature in 20-60m of water north-east of Broughton Islands and ~3-4 NM from shore and 3) 3-7 NM east to north-east of Broughton Island. MBES data were obtained using either a Geoswath 125 KHZ swath bathymetry system (2015) or a R2Sonic 2022 (2018) with Applanix Wavemaster POSMV with either Single-Base or Precise-Point-Positioning modules in POSView for improved vessel Smoothed Best Estimate of Trajectory. Data were cube modelled in Fledermaus/Qimera software to IHO 1B standard and cleaned-soundings exported before gridding by bin-weighted averaging at 5 m relative to Australian Height Datum and in grid coordinates as UTM WGS84 Zone56. Details on processing are provided at https://www.environment.nsw.gov.au/-/media/OEH/Corporate-Site/Documents/Research/Our-science-and-research/seabed-nsw-standard-operating-procedures-multibeam-surveying-190101.pdf. Data packages including bathymetry and backscatter in multiple formats are provided on the Australian Oceanographic Data Network (https://portal.aodn.net.au); Gridded data in geotif format are also provided on AusSeabed https://portal.ga.gov.au/persona/marine. Data are not to be used for navigation purposes. |
Resource locator |
|
Data Quality Statement |
Name: Data Quality Statement Protocol: WWW:DOWNLOAD-1.0-http--download Description: Data quality statement for NESP Biodiversity Hub Hunter Marine Park Multi Beam Echo Sounder Surveys Function: download |
Unique resource identifier |
|
Code |
8eb5d567-2f70-4d2c-88c6-924e19a87258 |
Presentation form |
Image digital |
Edition |
1 |
Dataset language |
English |
Metadata standard |
|
Name |
ISO 19115 |
Edition |
2016 |
Dataset URI |
https://datasets.seed.nsw.gov.au/dataset/8eb5d567-2f70-4d2c-88c6-924e19a87258 |
Purpose |
baseline for monitoring |
Status |
On going |
Spatial representation type |
grid |
Spatial reference system |
|
Code identifying the spatial reference system |
4283 |
Spatial resolution |
1 m |
Additional information source |
Data were collected on 7-9 separate dates during the time period to acquire imagery once from each for the randomly selected locations identified at the start of the survey. |
| Field | Value |
|---|---|
Topic category |
| Field | Value |
|---|---|
Keyword set |
|
keyword value |
MARINE-Biology MARINE-Coasts MARINE-Reefs MARINE-Geology-and-Geophysics |
Originating controlled vocabulary |
|
Title |
ANZLIC Search Words |
Reference date |
2008-05-16 |
Geographic location |
|
West bounding longitude |
152.332855 |
East bounding longitude |
152.717583 |
North bounding latitude |
-32.663263 |
South bounding latitude |
-32.401658 |
NSW Place Name |
Port Stephens Great Lakes Worimi |
Vertical extent information |
|
Minimum value |
-100 |
Maximum value |
2228 |
Coordinate reference system |
|
Authority code |
urn:ogc:def:cs:EPSG:: |
Code identifying the coordinate reference system |
5711 |
Temporal extent |
|
Begin position |
2019-10-20 |
End position |
N/A |
Dataset reference date |
|
Resource maintenance |
|
Maintenance and update frequency |
Unknown |
Contact info | |
Contact position |
Data Broker |
Organisation name |
NSW Department of Climate Change, Energy, the Environment and Water |
Telephone number |
131555 |
Email address |
|
Web address |
https://www.nsw.gov.au/departments-and-agencies/dcceew |
Responsible party role |
pointOfContact |
| Field | Value |
|---|---|
Lineage |
Surveying was undertaken based on the Australian Multibeam Guideline (Lucieer et al) and more recently updated in 'Field Manuals for Marine Sampling to Monitor Australian Waters' ( https://www.nespmarine.edu.au/field-manuals-marine-sampling-monitor-australian-waters, v.2020). Details of the NSW DPIE systems, equipment and processing are detailed in 'SeaBed NSW: Standard Operating Procedures of multibeam surveying' (https://www.environment.nsw.gov.au/-/media/OEH/Corporate-Site/Documents/Research/Our-science-and-research/seabed-nsw-standard-operating-procedures-multibeam-surveying-190101.pdf). XYZ positional accuracy of the bathymetry is generally better than XY (0.1 m) and Z (<0.5m) with further details on survey QAQC provided in the associated Survey Report (AusSeabed) and in the DPIE rigour statement (AODN data packages). Data were obtained during two periods 23/11/2015 to 16/1/2016 (Geoswath 125 khz swath bathy system) and 2) 21/4/2018 to 28/2/2019 (R2Sonic 2022: 200-400 khz MBES system) aboard RV Bombora with POS MV providing positioning (DGPS 2015-16 survey: G2 2018-19 survey) and 3-D motion (50 hz) post processed using PPP (2015-16) or SBS (2018-19) to provide an improved best estimate of vessel trajectory. Geoswath: SBET is applied in GS+ with Sound Velocity Sensor (SVS - surface) and SV profiles (SVP - water column) corrections for stage 1 filtering to GSF file format and then stage 2 cube filtering in Fledermaus (IHO1B). R2Sonic: raw files imported to Qimera with SBET and SVP corrections applied. nb: SV corrects for ray-bending arising from changes in water column density over a survey area at the surface and with depth. Cleaned-soundings are then gridded at 5 x 5m in grid coordinates WGS84Z56 and at Australian Height Datum. A signed NSW DPIE Rigor Statement is provided with our AODN data package (or upon request) with QC assessments, projection, datum and processing information (similar to AusSeabed survey report) and 3rd party cross-checked by either our hydrographer or mapping scientist. Data packages provide gridded data sets in multiple formats (gif, xyz, SD (Fledermaus), KMZ, ESRI Arc Ascii) are named as per the convention prefix NSWDPIE_yyyymmdd_LocationSite_MB (additional details in the rigor statement). |
| Field | Value |
|---|---|
Limitations on public access |
|
| Field | Value |
|---|---|
Scope |
dataset |
DQ Completeness Commission |
|
Effective date |
2020-10-10 |
Explanation |
A relatively small proportion of the gridded data lies within NSW state coastal waters and within the Port Stephens Great Lakes Marine Park |
DQ Completeness Omission |
|
Effective date |
2020-10-10 |
Explanation |
Grids of bathymetry are bin-weighted averages of cleaned soundings as determined from the Cube modelling and filtering; sounding point-cloud data will be provided a later stage or upon request |
DQ Conceptual Consistency |
|
Effective date |
2020-05-18 |
Explanation |
Spatial positioning of MB points is better than 0.1 m (XYZ) at nadir (vessel centre line from POS MV data) with positioning of features mapped by outer beams (distant from vessel; relies on precise lever arm measures and calculations of patch test offsets) better than 0.5m (XYZ) - see Total Propagated Uncertainty in Survey Report. |
DQ Absolute External Positional Accuracy |
|
Effective date |
2020-05-18 |
Explanation |
External positional accuracy is XYZ better than 0.2 m (Geoswath surveys using POS DGPS and PPP post processing for improved SBET in POSPac) and better than 0.1 m (R2Somic surveys using POS G2 in real-time and SBS post processing for SBET). |
DQ Non Quantitative Attribute Correctness |
|
Effective date |
2020-07-16 |
Explanation |
|
| Field | Value |
|---|---|
Responsible party |
|
Contact position |
Data Broker |
Organisation name |
NSW Department of Climate Change, Energy, the Environment and Water |
Telephone number |
131555 |
Email address |
|
Web address |
https://www.nsw.gov.au/departments-and-agencies/dcceew |
Responsible party role |
pointOfContact |
| Field | Value |
|---|---|
Metadata point of contact |
|
Contact position |
Data Broker |
Organisation name |
NSW Department of Climate Change, Energy, the Environment and Water |
Telephone number |
131555 |
Email address |
|
Web address |
https://www.nsw.gov.au/departments-and-agencies/dcceew |
Responsible party role |
pointOfContact |
Metadata date |
2024-02-26T15:40:19.444653 |
Metadata language |
|