Davis Coastal Seabed Mapping Survey, Antarctica (GA4301 / AAS2201 / HI468) - High Resolution Bathymetry Grids

• Other Authors: Commonwealth of Australia (Geoscience Australia) (distributor), Commonwealth of Australia (Geoscience Australia) (owner), Commonwealth of Australia (Geoscience Australia) (pointOfContact), EGD (hasAssociationWith), Geoscience Australia (publisher), JSMITH1 (custodian), Manager Client Services (custodian), O'Brien, P.E. (author), Spinoccia, M. (author)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: geoscientificInformation; Marine Geoscience; EARTH SCIENCES; GEOLOGY; HVC_144641; AusSeabed; Marine Data Bathymetry Grid; Antarctic data; bathymetry; marine; marine survey; antarctica; AQ; Published_External; Antarctic; Burton; Atkinson; Antarc*; Antarctica
• Online Access: https://researchdata.edu.au/davis-coastal-seabed-bathymetry-grids/684040; https://pid.geoscience.gov.au/dataset/ga/76729; https://doi.org/10.4225/25/562EC3979A133

Maintenance and Update Frequency: notPlanned Statement: The Coastal Seabed Mapping Survey, GA-4301 AAS2201 was acquired by Geoscience Australia onboard the AAD Workboat Howard Burton from the 15th of February to the 12th of March 2010. The Chief scientist onboard was Dr. Philip O'Brien (GA). This dataset was acquired by Ian Atkinson and processed onboard by Philip O'Brien, Ross Bowden and Jade Paddison and further processing was conducted in the office by Michele Spinoccia, using CARIS HIPS & SIPS ver 7.1.2. 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 artifacts. 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 values. A visual inspection of the data for each line was then undertaken where artifacts and noisy data not removed by the filtering process were removed manually using Swath and subset editors modules of the 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 ...