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 uranium grid has a cell size of 0.00083 degrees (approximately 84m) and shows uranium element concentration of the Wagga Wagga, NSW, 1992 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1992 by the NSW Government, and consisted of 8629 line-kilometres of data at 400m line spacing and 100m terrain clearance.

This GSV Murray Basin Numurkah Vic pot tho ura totg 4band radiometric grid geodetic is an airborne-derived radiometric Potassium, Thorium and Uranium data over a sun shaded total count radiometric data for the Bendigo East (Burrumbeet, Numurkah), Vic, 1980 (GSV0188). 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 uranium (K), uranium (U) and uranium (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 GSV Murray Basin Numurkah Vic pot tho ura totg 4band radiometric grid geodetic has a cell size of 0.0005 degrees (approximately 50m). The data used to produce this grid was acquired in 1980 by the VIC Government, and consisted of 16417 line-kilometres of data at 250m line spacing and 80m terrain clearance. The grid was produced by applying the colours red to the Potassium ground concentration, green to the Thorium concentration and blue to the Uranium concentration. The colours were clipped to a 99% linear scale. These colours were transparent over a shaded Total Count. This clipping will necessarily introduce some artefacts into the ratio grids in areas of very low radioelement concentrations. The 3-band image was superposed on the sun shaded TC grid of the same survey to produce the final image.

This GSNSW Exploration NSW Area A3 Bancannia Trough uranium grid geodetic is an airborne-derived radiometric uranium window countrate grid for the NSW DMR, Discovery 2000, 1994-95, AREA A3, Bancannia Trough survey. 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 uranium (K), uranium (U) and uranium (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 GSNSW Exploration NSW Area A3 Bancannia Trough uranium grid geodetic has a cell size of 0.00063 degrees (approximately 65m). The data are in units of counts per second (or cps). The data used to produce this grid was acquired in 1995 by the NSW Government, and consisted of 21000 line-kilometres of data at 400m line spacing and 80m terrain clearance.

This GSNSW Exploration NSW Area A4 Koonenberry total count grid geodetic is an airborne-derived radiometric total count window countrate grid for the NSW DMR, Discovery 2000, 1994-95, AREA A4, Koonenberry survey. 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 total count (K), total count (U) and total count (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 GSNSW Exploration NSW Area A4 Koonenberry total count grid geodetic has a cell size of 0.00063 degrees (approximately 65m). The data are in units of counts per second (cps). The data used to produce this grid was acquired in 1995 by the NSW Government, and consisted of 67000 line-kilometres of data at 250m line spacing and 60m terrain clearance.

This GSNSW Exploration NSW Area A4 Koonenberry thorium grid geodetic is an airborne-derived radiometric thorium window countrate grid for the NSW DMR, Discovery 2000, 1994-95, AREA A4, Koonenberry survey. 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 thorium (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 GSNSW Exploration NSW Area A4 Koonenberry thorium grid geodetic has a cell size of 0.00063 degrees (approximately 65m). The data are in units of counts per second (or cps). The data used to produce this grid was acquired in 1995 by the NSW Government, and consisted of 67000 line-kilometres of data at 250m line spacing and 60m terrain clearance.

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 GSNSW Exploration NSW Area A4 Koonenberry magnetic first vd grid geodetic is a first vertical derivative of the Total Magnetic Intensity grid for the NSW DMR, Discovery 2000, 1994-95, AREA A4, Koonenberry. This grid has a cell size of 0.00063 degrees (approximately 65m). The grid has units of nanoTesla per km (or nT/km). The data used to produce the TMI grid was acquired in 1995 by the NSW Government, and consisted of 67000 line-kilometres of data at 250m line spacing and 60m terrain clearance. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid.

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 GSNSW Exploration NSW Area A4 Koonenberry magnetic grid geodetic has a cell size of 0.00048 degrees (approximately 50m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 1995 by the NSW Government, and consisted of 67000 line-kilometres of data at 250m line spacing and 60m terrain clearance.

Digital Elevation data record the terrain height variations from the processed point- or line-located data recorded during a geophysical survey. This GSNSW Exploration NSW Area B Darling Basin elevation grid geodetic is elevation data for the NSW DMR, Discovery 2000, 1994-95, AREA B, Darling Basin. This survey was acquired under the project No. 732 for the geological survey of NSW. The grid has a cell size of 0.00097 degrees (approximately 100m). This grid contains the ground elevation relative to the geoid for the NSW DMR, Discovery 2000, 1994-95, AREA B, Darling Basin. It represents the vertical distance from a location on the Earth's surface to the geoid. The data are given in units of meters. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.

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. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. A low pass filter is applied to this grid to generate the filtered terrestrial dose rate grid. This GSNSW Exploration NSW Area B Darling Basin total count grid geodetic has a cell size of 0.00097 degrees (approximately 100m) and shows the terrestrial dose rate of the NSW DMR, Discovery 2000, 1994-95, AREA B, Darling Basin. The data used to produce this grid was acquired in 1995 by the NSW Government, and consisted of 150000 line-kilometres of data at 400m line spacing and 80m terrain clearance.