Levelled Marine Gravity, Magnetic and Bathymetry Line Data for Australia

Geoscience Australia's levelled ship-track line data compilation integrates gravity, magnetic, and bathymetry measurements from surveys conducted since the 1970s. The levelling process reduces mismatches between surveys of various vintages to create continuous surfaces. The compilation consists of ASCII files organized by survey, with records spaced approximately 150 meters.

Use Cases

• Modeling seafloor topography based on levelled bathymetry data.
• Analyzing crustal density variations based on levelled gravity data.
• Mapping magnetic anomalies for geological studies based on levelled magnetic data.
• Integrating multi-survey data for regional geophysical analysis based on the levelling process.

Strengths

• Includes data from surveys conducted since the 1970s, providing a long temporal span.
• Data has been levelled to reduce mismatches between intersecting surveys, enhancing integration.
• Record spacing is approximately 150 meters, suggesting a relatively high spatial resolution for line data.

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 the Mardat database.

Time Range

Surveys acquired since the 1970s.

Freshness

Last updated 2026-04-16 16:25:31.225554; freshness should be verified.

Geography

Australian region.