Reduced-To-Pole Magnetic Intensity Grid of Western Australia

A merged magnetic anomaly grid for onshore and offshore Western Australia, processed to the Reduced-To-Pole (RTP) transformation. The dataset integrates over 1500 open-file company surveys with Federal and State government data, using a 2015 national magnetic grid as a base reference. Data is visualized with a pseudo-color ramp and relief shading.

Use Cases

• Interpret magnetic anomaly patterns from the RTP-transformed grid for regional geological structure mapping.
• Integrate this merged grid with other geoscientific layers using its WMS/ArcGIS service format for spatial analysis.
• Use the color-ramp visualization (blue to red representing low to high values) for qualitative anomaly assessment and presentation.

Strengths

• Integrates a substantial volume of source data, including over 1500 open-file company surveys.
• Uses a well-defined base reference grid, the Geoscience Australia magnetic grid of Australia V6 2015.
• Data acquisition specifications include line spacing of 500 metres or less for detailed resolution.

Limitations

• The core data values and grid cell count (rows/columns) are unspecified, limiting quantitative assessment.
• Background areas are filled with lower-resolution base grid data where closer-spaced surveys are unavailable.
• Sample data and file size are not provided, hindering initial evaluation of data structure and volume.

Provenance

Source

Department of Energy, Mines, Industry Regulation and Safety (Chief Geophysicist).

Collection Method

Merged from Federal, State, and over 1500 open-file company magnetic survey datasets, processed with RTP transformation.

Time Range

Compilation version dated 2020; base reference grid is from 2015.

Freshness

Metadata was updated in March 2026, though the underlying grid compilation year is 2020.

Geography

Onshore and offshore Western Australia.