CSIRO Multibeam Backscatter Mapping of the Continental Shelf Backscatter 75m 2013

Multibeam sonar data maps 0.35 million square kilometers of Australia's continental margin seabed, collected since 2004 from the vessel Southern Surveyor. The dataset provides bathymetry and backscatter data gridded at 75-meter resolution, processed to level 2 of a 5-level hierarchy, to infer ecological features and substrate types. It supports environmental seabed mapping by characterizing hard and soft substrates for marine habitat analysis.

Use Cases

• Identifying key ecological features like seamounts, canyons, and deep reefs based on bathymetry data.
• Classifying seabed substrate as hard (rock) or soft (mud) for habitat suitability analysis using backscatter data.
• Applying corrections for sound absorption and area insonified to improve backscatter consistency for substrate mapping.
• Supporting a national backscatter mapping program framework for environmental management.

Strengths

• Covers a large, explicitly mapped area of 0.35 million square kilometers.
• Data is processed to a consistent, documented level (level 2) within a 5-level hierarchy, with specific corrections applied.
• Provides high-resolution (75m) gridded bathymetry and backscatter data.

Limitations

• Specific column names and data structure are not provided in the available metadata.
• License information is not specified across any platform entry.
• The dataset is explicitly flagged as 'Not to be used for navigational purposes', limiting its application scope.

Provenance

Source

Commonwealth of Australia (Geoscience Australia)

Collection Method

Collected via multibeam sonar (MBS) from the marine national facility vessel Southern Surveyor on opportunistic transit and research voyages.

Time Range

2004 onward

Freshness

2026-06-05 07:19:12.568684

Geography

Australia's continental margin, including the Bass Strait, Coral Sea, Great Australian Bight, Gulf of Carpentaria, and adjacent Indian and Pacific Oceans.