AUSTREA-1: Seafloor Mapping Survey of Southeast Australia and Great Australian Bight
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Description
The AUSTREA-1 survey, conducted by the Australian Geological Survey Organisation in January 2000, mapped approximately 120,000 km² of seabed over 11,000 km off southeast Australia. Data collected includes swath-bathymetry, seismic profiles, sub-bottom profiles, gravity, magnetics, and oceanographic measurements for marine planning and resource assessment. The work was a major step towards implementing Australia's Oceans Policy and supporting the Southeast Regional Marine Plan.
Use Cases
Modeling seabed terrain and habitat based on swath-bathymetry and backscatter imagery.
Assessing petroleum and mineral resource potential based on seismic and sub-bottom profile data.
Analyzing oceanographic conditions and currents based on ADCP, XBT, and sea surface measurements.
Mapping benthic communities and marine protected areas based on detailed seafloor morphology.
Studying continental margin geology and volcanic features based on geophysical survey data.
Strengths
Covers a large area of approximately 120,000 km², about 1.5 times the size of Tasmania.
Data quality is described as 'mostly excellent' in the survey report.
Includes a diverse suite of geophysical and oceanographic data types collected during a single, dedicated 25-day cruise.
Limitations
Column-level documentation is absent; field semantics must be inferred after download.
Last updated 2026-04-10 22:02:50.953109; freshness should be verified.
Data is provided in PDF and HTML report formats, not as raw, structured datasets.
Provenance
Source
Australian Ocean Data Network (aggregating data from the Australian Geological Survey Organisation).
Collection Method
Seabed swath-mapping and geophysical survey using the RV L'Atalante, collecting Simrad EM 12D bathymetry, GI-gun seismic, sub-bottom profiles, gravity, magnetics, and oceanographic data.
Time Range
Survey conducted from 18 December 1999 to 11 January 2000.
Freshness
Survey conducted in December 1999-January 2000; metadata last updated in 2026.
Geography
Lord Howe Island, southeast Australian margin, central Great Australian Bight, and waters off Tasmania, Victoria, and South Australia.
Data is presented as a cruise report in PDF/HTML format; raw data files may need to be sourced separately.