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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 Bowen Surat Gravity Bouguer Anomaly is a complete Bouguer anomaly grid for the Bowen Surat (P200540). This gravity survey was acquired under the project No. 200540 for the geological survey of QLD. The grid has a cell size of 0.00764 degrees (approximately 800m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 4977 gravity stations were acquired to produce this grid.
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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 magnetic grid has a cell size of 0.00042 degrees (approximately 43m).The data are in nanoTesla (or nT). The data used to produce this grid was acquired in 2019 by the SA Government, and consisted of 1660000 line-kilometres of data at 200m line spacing and 60m terrain clearance. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid. This survey grid is essentially levelled to AWAGS.The data has had a variable reduction to the pole applied to centre the magnetic anomaly over the magnetised body. The VRTP processing followed a differential reduction to pole calculation up to 5th order polynomial. Magnetic inclination and declination were derived from the IGRF-11 geomagnetic reference model using a data representative date and elevation representative of the survey.
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Digital Elevation data record the terrain height variations from the processed point- or line-located data recorded during a geophysical survey. This Cape York (P520 P521 P522) elevation grid is elevation data for the Cape York (Aurukun, Coen), QLD, 1986. This survey was acquired under the project No. 520 for the geological survey of QLD. The grid has a cell size of 0.00417 degrees (approximately 457m). This grid contains the ground elevation relative to the geoid for the Cape York (Aurukun, Coen), QLD, 1986. 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.
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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 Westmoreland Complete Spherical Cap Bouguer 1VD geodetic is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the Westmoreland-Normanton Gravity Survey (P200840). This gravity survey was acquired under the project No. 200840 for the geological survey of QLD. The grid has a cell size of 0.0074 degrees (approximately 803m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 6414 gravity stations at a spacing between 2000m and 4000m were acquired to produce this grid.
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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 Westmoreland Complete Spherical Cap Bouguer geodetic is a complete spherical cap Bouguer anomaly grid for the Westmoreland-Normanton Gravity Survey (P200840). This gravity survey was acquired under the project No. 200840 for the geological survey of QLD. The grid has a cell size of 0.0074 degrees (approximately 803m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 6414 gravity stations were acquired to produce this grid.
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Digital Elevation data record the terrain height variations from the processed point- or line-located data recorded during a geophysical survey. This West Musgrave Gravity Survey Elevation Grid geodetic is elevation data for the West Musgrave Gravity 2008 WA (P200860). This survey was acquired under the project No. 200860 for the geological survey of WA. The grid has a cell size of 0.0046 degrees (approximately 485m). This grid contains the ground elevation relative to the geoid for the West Musgrave Gravity 2008 WA (P200860). 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.
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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 West Musgrave Complete Gravity Bouguer Anomaly 1VD Grid geodetic is a complete Bouguer anomaly grid for the West Musgrave Gravity 2008 WA (P200860). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. This gravity survey was acquired under the project No. 200860 for the geological survey of WA. The grid has a cell size of 0.0046 degrees (approximately 485m). A total of 4027 gravity stations were acquired to produce this grid.
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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 West Musgrave Complete Gravity Bouguer Anomaly Grid geodetic is a complete Bouguer anomaly grid for the West Musgrave Gravity 2008 WA (P200860). This gravity survey was acquired under the project No. 200860 for the geological survey of WA. The grid has a cell size of 0.0046 degrees (approximately 485m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 4027 gravity stations were acquired to produce this grid.
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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 West Musgrave Gravity Bouguer Anomaly Grid geodetic is a complete Bouguer anomaly grid for the West Musgrave Gravity 2008 WA (P200860). This gravity survey was acquired under the project No. 200860 for the geological survey of WA. The grid has a cell size of 0.0046 degrees (approximately 485m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 4027 gravity stations were acquired to produce this grid.
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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 Windimurra 2500mx2500m only complete spherical cap Bouguer267 is a complete spherical cap Bouguer anomaly grid for the Windimurra Gravity Survey (P200861). This gravity survey was acquired under the project No. 200861 for the geological survey of WA. The grid has a cell size of 0.0046 degrees (approximately 480m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 6042 gravity stations were acquired to produce this grid.