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Description
140,000 km² of seabed was mapped during the 2000 AUSTREA-2 cruise using Simrad EM12D swath bathymetry, backscatter, seismic, and oceanographic sensors. The survey, conducted by the Australian Geological Survey Organisation, aimed to define Australia's Continental Shelf and assess marine resources. Data includes bathymetry, backscatter, seismic profiles, sub-bottom profiling, gravity, magnetic, temperature, current, and salinity measurements.
Use Cases
Analyze Simrad EM12D swath bathymetry and backscatter data to model seabed terrain features like slope canyons and seamounts.
Integrate 6-channel GI-gun seismic and 3.5 kHz sub-bottom profiling data with bathymetry to study subsurface geology.
Correlate seawater temperature, current, and salinity depth profiles with bathymetric data for oceanographic studies.
Use gravity and magnetic profile data alongside bathymetry for geophysical analysis of the continental margin.
Strengths
Survey mapped approximately 140,000 km² of seabed.
Data collection includes multiple geophysical and oceanographic sensor types.
Weather conditions were highly favourable, contributing to excellent data quality.
Limitations
Primary data formats are PDF and HTML reports, not raw, structured tabular or raster data.
Sample data and specific column definitions are unavailable.
Data is from a single cruise in 2000, offering no temporal series.
Provenance
Source
Australian Geological Survey Organisation (AGSO), now Geoscience Australia.
Collection Method
Ship-based survey using the N/O L'Atalante vessel with swath-mapping and geophysical instruments.
Time Range
January to February 2000.
Freshness
null
Geography
South and south-east Tasmania, southern Macquarie Ridge Complex, South Tasman Rise.
Data is presented as cruise reports (PDF, HTML); raw digital sensor data may require separate access. License is not specified.