Magnetic Anomaly Grid of Australia, 2002 Onshore/Offshore Edition

January 2002 edition of the Magnetic Anomaly Grid of the Australian Region, representing the first integrated onshore/offshore grid for the complete Australian margin. The grid contains 3,022,656 data points, has a cell size of 0.01 degree (approximately 1 km), and was created by combining levelled and unlevelled marine sectors with an onshore grid. The data were processed by the Australian Ocean Data Network, with marine data levelled in collaboration with Intrepid Geophysics.

Use Cases

• Geological mapping and crustal studies based on magnetic anomaly measurements.
• Resource exploration targeting based on integrated onshore and offshore magnetic data.
• Geophysical modeling based on a 1 km resolution grid covering a large spatial extent (8S - 52S, 106E - 172E).
• Assessing data continuity challenges for studies focusing on the join between onshore and offshore grids.

Strengths

• First integrated onshore/offshore magnetic anomaly grid for the complete Australian margin.
• Grid is derived from 3,022,656 individual data points.
• Provides a defined spatial coverage from 8S to 52S and 106E to 172E.
• Specifies a grid cell size of 0.01 degree (approximately 1 km resolution).

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• The description notes mismatches at the join between onshore and offshore grids due to poor control during the merging process.

Provenance

Source

Australian Ocean Data Network

Collection Method

Combination of levelled and unlevelled marine magnetic survey sectors with an existing onshore grid.

Time Range

Represents the January 2002 edition; marine data for the eastern sector was levelled in 2000.

Freshness

Last updated 2026-06-05 07:19:41.768015; freshness should be verified.

Geography

Australian margin extending from 8S to 52S and 106E to 172E.