Marine Geophysical Survey Data for Australia, Levelled from the 1970s

Geoscience Australia's compilation of levelled gravity, magnetic, and bathymetry ship-track line data from the 'Mardat' database. The data includes surveys from the 1970s onward, processed to reduce errors between intersecting surveys for integration into continuous surfaces. The levelling was performed by Desmond FitzGerald & Associates (1998-2001) and Ron Hackney (2009-2011), with final review by Yvette Poudjom Djomani.

Use Cases

• Creating continuous gravity anomaly maps based on levelled ship-track data.
• Modeling magnetic field variations for geological studies based on the integrated survey data.
• Analyzing seafloor topography (bathymetry) for oceanographic and tectonic research.
• Integrating multi-vintage geophysical surveys into a unified regional model.

Strengths

• Data has been levelled to reduce errors between intersecting surveys from different vintages.
• Includes both unlevelled source data and the processed levelled data for comparison.
• Surveys span a long temporal range, with data acquired since the 1970s.

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 data from seismic reflection surveys.

Provenance

Source

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

Collection Method

Levelled ship-track line data compiled from surveys, processed for gridding.

Time Range

Surveys acquired since the 1970s.

Freshness

Last updated 2026-04-10 16:36:48.865315; freshness should be verified.

Geography

Australian marine region.