AGSO Cruise 125: Swath-mapping and Seismic Survey of Tasman Sea Bathymetry

AGSO Cruise 125 collected swath-mapping and reflection seismic data in the Tasman Sea off Tasmania in 1994 using the French research vessel L'Atalante. The dataset includes maps at scales of 1:250,000, 1:1,000,000, and 1:100,000, covering ship tracks, sonar imagery, and bathymetric contours. The data was aggregated by Geoscience Australia and last updated on the platform in March 2026.

Use Cases

• Analyze seafloor bathymetry and morphology based on detailed contour maps at 20m, 25m, and 50m intervals.
• Study sonar imagery overlays for geological feature identification and sediment distribution.
• Map ship tracks and survey lines for cruise path reconstruction and data coverage assessment.
• Produce regional-scale bathymetric charts based on the 1:1,000,000 scale maps of the entire Tasmanian survey area.

Strengths

• Data collection utilized the SIMRAD EM12D system, noted for its wide-angle swath-mapping capability.
• Maps were produced at multiple scales (1:250,000, 1:1,000,000, 1:100,000) for different analysis needs.
• Coverage includes transit routes and a detailed survey area off Tasmania, providing regional context.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset size are unknown, which may limit suitability assessment.
• Data is from a single cruise in 1994; freshness should be verified for contemporary applications.

Provenance

Source

Geoscience Australia Data

Collection Method

Swath-mapping and reflection seismic survey conducted using R.V. L'Atalante.

Time Range

12 February 1994 to 29 March 1994

Freshness

Last updated 2026-03-25 16:49:18.132756; freshness should be verified

Geography

Tasman Sea, off Tasmania, with transits from Auckland to Adelaide.