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Robert magnetic grid geodetic

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Created 20/01/2025

Updated 20/01/2025

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Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. This Robert magnetic grid geodetic has a cell size of 0.0006 degrees (approximately 63m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 1991 by the WA Government, and consisted of 81842 line-kilometres of data at 300m line spacing and 60m terrain clearance.

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Title Robert magnetic grid geodetic
Language eng
Licence Not Specified
Landing Page https://devweb.dga.links.com.au/data/dataset/2ee05bfd-0790-4194-8c9e-aa8b9574a1d0
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 28/02/1991 - 27/03/1991
Geospatial Coverage
Map data © OpenStreetMap contributors
Data Portal Data.gov.au