Marine Gravity, Magnetic and Bathymetry Levelled Line Data in the Australian Region

Australian region ship-track data compiled from Geoscience Australia's Mardat database and other institutions since the 1970s. The compilation contains gravity, magnetic, and bathymetry data that has been levelled to reduce errors between intersecting surveys for integration into continuous surfaces. Data was levelled by Desmond FitzGerald & Associates (1998-2001) and Ron Hackney (2009-2011), with final review by Yvette Poudjom Djomani.

Use Cases

• Modeling seafloor topography and geological structures based on levelled bathymetry and gravity data.
• Analyzing magnetic anomalies for resource exploration based on levelled magnetic field data.
• Creating integrated geophysical maps of the Australian region based on levelled, multi-survey data.
• Studying long-term changes in marine geophysical measurements based on time-indexed survey data from the 1970s onward.

Strengths

• Data has been levelled to reduce errors between intersecting surveys of various vintages.
• Includes source (unlevelled) and processed (levelled) versions of gravity, magnetic, and bathymetry data.
• Compilation spans multiple decades, incorporating surveys from the 1970s onward.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The compilation does not include shot-indexed seismic reflection data.

Provenance

Source

Geoscience Australia marine geophysical survey database 'Mardat' and other institutions.

Collection Method

Levelled ship-track line data derived from surveys, organized by survey in ASCII fixed format files.

Time Range

Surveys acquired since the 1970s; levelling performed 1998-2001 and 2009-2011.

Freshness

Last updated 2026-03-25 16:30:25.767723; freshness should be verified.

Geography

Australian region.