Bunurong Marine National Park survey 2017 (GA4879)

Brief description

This resource includes bathymetry data acquired during the Bunurong Marine National Park bathymetry survey acquired by Deakin University Marine Mapping Lab during the period of 14 – 16 June and 21 – 22 September 2017 onboard the MV Yolla using a Kongsberg Maritime EM2040C multibeam sonar. The Bunurong Marine National Park bathymetry survey was led by Dr. Daniel Ierodiaconou (Deakin University). The survey was part of a Parks Victoria project to better understand the habitats and associated biodiversity of Bunurong Marine National Park. This dataset contains a 2m-resolution 32-bit floating point geotiff file of the bathymetry in the study area, derived from the processed EM2040C bathymetry data, using CARIS HIPS and SIPS software. A detailed report on the survey is provided in: Young M, Porskamp P, Murfitt S, Wines S, Tinkler P, Bursic, J., Allan B, Howe S, Whitmarsh S, Pocklington J, Ierodiaconou D 2021. Baseline habitat mapping and enhanced monitoring trials of subtidal and intertidal reef habitats in Victoria’s marine national parks and sanctuaries. Parks Victoria Technical Series 116. This dataset is not to be used for navigational purposes. This dataset is published with the permission of the CEO, Geoscience Australia.

Lineage

Maintenance and Update Frequency: asNeeded

Statement: While AusSeabed aims to publish data based on the requirements stated in the AusSeabed multibeam guidelines (version 1, https://australian-multibeam-guidelines.github.io), we will also publish interim products (version 0) that are currently available, but have not yet been standardised (version 1). Users should be aware that V1 products will always supersede V0 products. This dataset was produced using CARIS HIPS & SIPS and the AusSeabed-recommended processing methodology as follows.
1. A new Caris project was created in conjunction with existing or newly created vessel configuration file(s).
2. The raw swath sonar data files were imported to the project. GGK is the preferred navigation and ellipsoid height source.
3. The POSMV data files were imported to the project to bring in delayed heave, delayed heave RMS.
4. Post-processed POS MV data in POSPAC 8.3
5. Applied SBETS to data in CARIS (SmartBase Solution).
6. TPU and GPS tide were computed and all data were georeferenced (merged) to Ellipsoid datum.
7. A CUBE was generated as a reference surface for data cleaning.
8. An automated data cleaning using the surface cleaning method with the reference surface was undertaken.
9. Further manual cleaning was conducted as required after visual assessment.
10. The final grid was produced at an optimum resolution of 2m.
11. At Geoscience Australia, the received geotiff was shifted to EGM2008 using AusCoastVDT and CARIS HIPS and SIPS.
12. The final processed grids were exported as a 32-bit floating point Geotiff at 2m resolution, referenced to EGM2008.

Notes

Purpose
bathymetry survey