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. These line dataset from the Murrindal, Vic, 1996 VIMP Survey (GSV3060) survey were acquired in 1995 by the VIC Government, and consisted of 15589 line-kilometres of data at 200m line spacing and 80m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected 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 radiometric thorium grid has a cell size of 0.00078 degrees (approximately 80m) and shows thorium element concentration of the Murray Basin Airborne Survey, NSW, 2005 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2005 by the NSW Government, and consisted of 95495 line-kilometres of data at 400m line spacing and 60m terrain clearance.

Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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 Woodline Detailed Gravity Survey, 2008, WA A80820 (P200863) contains a total of 170 point data values acquired at a spacing between 400 and 800 metres. The data is located in WA and were acquired in 2008, under project No. 200863 for Newmont Exploration Pty Ltd.

Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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 Southern Delamerian Gravity along seismic lines, Vic 2009 (P200902) contains a total of 667 point data values acquired at a spacing of 400 metres. The data is located in VIC and were acquired in 2009, under project No. 200902 for None.

Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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 GSNSW DPI Jerilderie Oaklands Basin Complete Spherical Cap Bouguer geodetic is a complete spherical cap Bouguer anomaly grid for the Oaklands Basin - Jerilderie Gravity Survey, 2009, NSW (P200920). This gravity survey was acquired under the project No. 200920 for the geological survey of NSW. The grid has a cell size of 0.0075 degrees (approximately 759m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 2350 gravity stations were acquired to produce this grid.

Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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 GSNSW DPI Jerilderie Oaklands Basin Vertical Derivative geodetic is a first vertical derivative of the Bouguer anomaly grid for the Oaklands Basin - Jerilderie Gravity Survey, 2009, NSW (P200920) survey. This gravity survey was acquired under the project No. 200920 for the geological survey of NSW. The grid has a cell size of 0.0075 degrees (approximately 759m). A total of 2350 gravity stations were acquired to produce the original grid. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid.

Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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 Broken Hill Complete Spherical Cap Bouguer 2009 geodetic is a complete spherical cap Bouguer anomaly grid for the Broken Hill - Western NSW Gravity Survey, 2009 (P200921). This gravity survey was acquired under the project No. 200921 for the geological survey of NSW. The grid has a cell size of 0.0037 degrees (approximately 378m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 6998 gravity stations were acquired to produce this grid.

Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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 Broken Hill - Western NSW Gravity Survey, 2009 (P200921) contains a total of 6998 point data values acquired at a spacing between 1000 and 4000 metres. The data is located in NSW and were acquired in 2009, under project No. 200921 for New South Wales Department of Primary Industries.

Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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 Cape York Complete Spherical Cap Bouguer geodetic is a complete spherical cap Bouguer anomaly grid for the Cape York Gravity Survey, Qld, 2009 (P200940). This gravity survey was acquired under the project No. 200940 for the geological survey of QLD. The grid has a cell size of 0.0075 degrees (approximately 820m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 9244 gravity stations were acquired to produce this grid.