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Identification

Field Value

Title

NSW Environment Multi Beam Echo Sounder Gridded Data

Alternative title(s)

Seabed NSW state-wide mapping program

Abstract

Gridded multi-beam echousounder (MBES) bathymetry and backscatter data acquired using NSW government's (NSW Department of Climate Change Energy Environment and Water) multi-beam echosounder (MBES) systems aboard RV's Bombora, Seascan and Glaucus. Fieldwork surveys were completed as part of the SeabedNSW program funded by NSW government under State-wide Science (2022-30), Coastal Reforms (2015-2022), HabMap Program (2005-2015) or under collaboration with partner agencies or institutions (DPI, Parks Australia, NESP). Surveys are predominantly on the open coast and within NSW state waters (2017) with Applanix Wavemaster POSMV (>2011) providing positioning, height (RTK) and 3D motion solution; or Edgetech swath system w sidescan (>2021). MBES was collected in GS+ (GeoAcoustics) or Hypack with attitude and positional data acquired in POSView and post processed using POSPac either Single-Base or Precise-Point-Positioning modules for improved vessel Smoothed Best Estimate of Trajectory. Data were cube modeled in Fledermaus/Qimera software (>2010) to IHO 1B standard and cleaned-soundings exported before being gridded using bin-weighted averaging (generally 5 m grid cell size) relative to Australian Height Datum and issued in grid coordinates (UTM WGS84 Zone55 or 56; GDA2020 Zone 55 or 56). General details on vessel setup, mobilisation and 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 with survey specific details in the Survey Report and survey Rigor Statement (provided upon request). Data packages provided via the Australian Oceanographic Data Network (https://portal.aodn.org.au/) include bathymetry and backscatter in multiple formats; while those provided on AusSeabed (https://portal.ga.gov.au/persona/marine) are gridded bathymetry and backscatter data as geotif only. 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 NSW Environment Multi Beam Echo Sounder Surveys

Function: download

AODN

Name: AODN

Protocol: WWW:DOWNLOAD-1.0-http--download

Description:

Data available from AODN

Function: download

Unique resource identifier

Code

923bf691-f0aa-4c49-879d-4bb632d29e68

Presentation form

Table digital

Edition

1

Dataset language

English

Metadata standard

Name

ISO 19115

Edition

2016

Dataset URI

https://www.planningportal.nsw.gov.au/opendata/dataset/923bf691-f0aa-4c49-879d-4bb632d29e68

Purpose

foundational data collection; baseline for monitoring

Status

On going

Spatial representation type

grid

Spatial reference system

Code identifying the spatial reference system

4283

Spatial resolution

5 m

Additional information source

Data within the broader collection were acquired from 2005 on-wards during various major internal programs.

Classification of spatial data and services

Field Value

Topic category

imageryBaseMapsEarthCover

Keywords

Field Value

Keyword set

keyword value

MARINE-Biology

MARINE-Coasts

MARINE-Reefs

MARINE-Geology-and-Geophysics

ECOLOGY-Habitat

GEOSCIENCES-Geomorphology

Originating controlled vocabulary

Title

ANZLIC Search Words

Reference date

2008-05-16

Geographic location

NSW Place Name

New South Wales Marine Estate

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

2005-01-01

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

Full postal address

NSW

Australia

data.broker@environment.nsw.gov.au

Telephone number

131555

Email address

data.broker@environment.nsw.gov.au

Web address

https://www.nsw.gov.au/departments-and-agencies/dcceew

Responsible party role

pointOfContact

Quality and validity

Field Value

Lineage

Surveys were undertaken based on the Australian Multibeam Guideline (Lucieer et al, 2018) 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 (>2011 w POS system setup) is generally better than XY (0.1 m) and Z (2017) to provide an improved best estimate of vessel trajectory. Geoswath processing: >2011 SBET was 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/Qimera (IHO1B). R2Sonic and Edgetech system: raw files imported to Qimera with SBET and SVP corrections (including TU Delft speed of sound inversion) applied to built qpd files. Cloud data is filtered using shallow-bias and a cube surface created at 2m grid cell size and highlighting soundings greater than 2 standard deviations form the predicted mean. Note: SV corrects for ray-bending arising from changes in water column density over a survey area at the surface and with depth. Generally. cleaned-soundings are then exported and/or gridded at 5 x 5m in grid coordinates WGS84Z56 and at Australian Height Datum. A signed NSW DPE 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 scientists. Data packages provide gridded data sets in multiple formats (gif, xyz, SD (Fledermaus), KMZ, ESRI Arc Ascii) are named as per the convention prefix NSWENV_yyyymmdd_LocationSite_MB (additional details are provided within the rigor statement and the Standard Operating Procedure).

Constraints related to access and use

Field Value

Constraint set

Use constraints

This data is provided under a Creative Commons Attribution 4.0 licence http://creativecommons.org/licenses/by/4.0. Attribute 'NSW Department of Climate Change, Energy, the Environment and Water' in publications using this data.

Limitations on public access

Data Quality

Field Value

Scope

dataset

DQ Completeness Commission

Effective date

2021-10-05

Explanation

Gridded data predominantly lies within NSW state coastal waters with some smaller subsets >3NM over the NSW inner shelf or within Victorian state waters (Cape Howe).

DQ Completeness Omission

Effective date

2021-10-05

Explanation

Grids (XYZ, TIF, SD) 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

2021-10-05

Explanation

Generally, 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 0.25m (XYZ) - see Total Propagated Uncertainty in Survey Report and/or rigor statement.

DQ Absolute External Positional Accuracy

Effective date

2021-10-05

Explanation

Generally, external positional accuracy is XYZ better than 0.2 m (2011-2017; Geoswath surveys using POS DGPS and PPP post processing for improved SBET in POSPac) and better than 0.1 m (2017-present; R2Sonic surveys using POS G2 in real-time and SBS post processing for SBET).

DQ Non Quantitative Attribute Correctness

Effective date

2020-07-16

Explanation

Responsible organisations

Field Value

Responsible party

Contact position

Data Broker

Organisation name

NSW Department of Climate Change, Energy, the Environment and Water

Full postal address

NSW

Australia

data.broker@environment.nsw.gov.au

Telephone number

131555

Email address

data.broker@environment.nsw.gov.au

Web address

https://www.nsw.gov.au/departments-and-agencies/dcceew

Responsible party role

pointOfContact

Metadata on metadata

Field Value

Metadata point of contact

Contact position

Data Broker

Organisation name

NSW Department of Climate Change, Energy, the Environment and Water

Full postal address

NSW

Australia

data.broker@environment.nsw.gov.au

Telephone number

131555

Email address

data.broker@environment.nsw.gov.au

Web address

https://www.nsw.gov.au/departments-and-agencies/dcceew

Responsible party role

pointOfContact

Metadata date

2024-02-26T13:48:49.721036

Metadata language