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GSQ Thomson Extension TMI 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 GSQ Thomson Extension TMI grid geodetic has a cell size of 0.00083 degrees (approximately 88m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 2011 by the QLD Government, and consisted of 46530 line-kilometres of data at 400m line spacing and 80m terrain clearance.

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Field Value
Title GSQ Thomson Extension TMI grid geodetic
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/4f3ddfdf-e6d3-48d1-bdee-e510f259b6d5
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 22/06/2011 - 10/08/2011
Geospatial Coverage {"type": "Polygon", "coordinates": [[[145.8096, -26.5375], [147.3506, -26.5375], [147.3506, -25.4863], [145.8096, -25.4863], [145.8096, -26.5375]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "GSQ Thomson Extension TMI grid geodetic". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/gsq-thomson-extension-tmi-grid-geodetic