JSON format icon JSON RDF format icon RDF ISO19115-3 XML

Jamestown tmi grid geodetic

ARCHIVED

Created 14/01/2025

Updated 14/01/2025

JSON format icon JSON RDF format icon 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 Jamestown tmi grid geodetic has a cell size of 0.00021 degrees (approximately 21m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 2002 by the SA Government, and consisted of 8919 line-kilometres of data at 100m line spacing and 60m terrain clearance.

Files and APIs

Tags

Additional Info

Field Value
Title Jamestown tmi grid geodetic
Language eng
Licence Not Specified
Landing Page https://devweb.dga.links.com.au/data/dataset/9f8eb753-5f36-44b1-b2aa-d1a500ced4dc
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/06/2002 - 02/08/2002
Geospatial Coverage
Map data © OpenStreetMap contributors
Data Portal Data.gov.au