Davis Coast Bathymetry Survey 2017

• Other Authors: Commonwealth of Australia (Geoscience Australia) (distributor), Commonwealth of Australia (Geoscience Australia) (pointOfContact), Manager Client Services (pointOfContact), Manager Client Services (publisher), Place, Space and Communities Division (resourceProvider), Siwabessy, J. (pointOfContact), Yule, C. (author)
• Format: Dataset
• Language: unknown
• Published: Geoscience Australia
• Subjects: geoscientificInformation; Marine Geoscience; EARTH SCIENCES; HVC_144641; AusSeabed; Marine Data; Bathymetry Grid; Antarctic Data; Marine; Marine Survey; Antarctica; Published_External; Antarctic; Burton; Coates; Wyatt; Wyatt Earp; Davis Coast; Antarc*; Australian Antarctic Division; Australian Antarctic Program
• Online Access: https://researchdata.edu.au/davis-coast-bathymetry-survey-2017/1702464; https://pid.geoscience.gov.au/dataset/ga/145276; https://doi.org/10.26186/145276

Maintenance and Update Frequency: asNeeded Statement: The survey data was acquired by Geoscience Australia using the Australian Antarctic Division workboat Howard Burton 10 January to 6 February 2017 as a component of Australian Antarctic Program (AAP) Project 5093 Hydrographic Surveying and Seafloor Characterisation Program. The Chief Scientist onboard the Howard Burton was Dr. Jodie Smith (Geoscience Australia) and the Officer in Charge of Survey onboard the Wyatt Earp was LCDR MI Kumpis (Deployable Geospatial Support Team, DGST). Initial processing of the datasets was conducted during the survey by Kim Picard (Geoscience Australia), POHSM PJ Coates and LCDR MI Kumpis (DGST). The high-resolution bathymetry grid (2 m resolution) was produced following final processing by Michele Spinoccia (Geoscience Australia), using CARIS HIPS & SIPS ver 7.1.2 and 9.1.12. The 32bit Geotiff provided here was processed by Christopher Yule (Geoscience Australia) using CARIS HIPS & SIPS ver 11.3. Processing methodology: 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, 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-43S. 7. The data was cleaned by applying several filters that removed any remaining spikes in the bathymetry data using user defined threshold ...