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GSWA Yalgoo TMI Grid Geodetic

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Created 13/01/2025

Updated 13/01/2025

JSON RDF ISO19115-3 XML

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 GSWA Yalgoo TMI Grid Geodetic has a cell size of 0.00021 degrees (approximately 22m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 2015 by the WA Government, and consisted of 126967 line-kilometres of data at a line spacing between 100m and 200m, and 50m terrain clearance.

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Title GSWA Yalgoo TMI Grid Geodetic
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/3f433337-c8c5-49ea-b8f5-c1e8d9807559
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 01/07/2015 - 23/11/2015
Geospatial Coverage {"type": "Polygon", "coordinates": [[[116.471, -29.509], [117.5289, -29.509], [117.5289, -28.491], [116.471, -28.491], [116.471, -29.509]]]}
Data Portal data.gov.au