IN2018_V04: Southern EAC Multibeam Bathymetry and Watercolumn Data

23 files totalling 11.1 GB of raw multibeam echosounder data were collected aboard RV Investigator voyage IN2018_V04 from 11 September to 8 October 2018. The Kongsberg EM710 MKII system acquired seafloor bathymetry, backscatter, and watercolumn backscatter data at a nominal frequency of 40-100 kHz. Processed data includes line data in *.gsf and ASCII formats, and bathymetry/backscatter grids in GeoTIFF format.

Use Cases

• Seafloor mapping and habitat characterization based on bathymetry and backscatter grids.
• Analysis of water column backscatter for studying pelagic biomass or scattering layers.
• Geophysical survey planning and validation using processed line data in *.gsf format.
• Integrating bathymetric data with oceanographic models of the East Australian Current region.

Strengths

• Data volume is precisely quantified at 23 raw files totalling 11.1 GB.
• Describes specific processing steps, including motion/position correction and outlier removal.
• Provides multiple data formats (raw *.all/*.wcd, processed *.gsf, ASCII, GeoTIFF) for different analysis needs.

Limitations

• Metadata completeness is low: column names, row counts, license, and author information are unknown.
• The description contains an unresolved placeholder regarding tide corrections ('[were/were not] applied').
• The dataset's cross-platform presence is limited to a single source (data.gov.au), reducing independent verification.

Provenance

Source

CSIRO Marlin Data Catalogue, collected on RV Investigator voyage IN2018_V04.

Collection Method

Acquired using a Kongsberg EM710 MKII multibeam echosounder during a dedicated oceanographic voyage.

Time Range

11 September 2018 to 8 October 2018

Freshness

2026-05-02 10:11:08.228356

Geography

Southern extension of the East Australian Current, voyage departed and returned to Hobart, Australia.