First vertical derivative of the Bouguer gravity grid of North Perth Gingin Brook Gravity Survey, 2013 survey
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Geophysical Acquisition & Processing Section
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 North_Perth_Gingin_Brook_Gravity_CSCBA230GUVD_Geodetic_p201360.nc grid is a first vertical derivative of the Bouguer anomaly grid for the North Perth Gingin Brook Gravity Survey, 2013 survey. This gravity survey was acquired under the project No. 201360 for the geological survey of WA. The grid has a cell size of 0.00363308 degrees (approximately 370m). A total of 1253 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.
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This North_Perth_Gingin_Brook_Gravity_CSCBA230GUVD_Geodetic_p201360.nc grid is a first vertical derivative grid of the Bouguer anomaly for the North Perth Gingin Brook Gravity Survey, 2013 survey. This gravity survey was acquired under the project No. 201360 for the geological survey of WA. The grid has a cell size of 0.00363308 degrees (approximately 370m). A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the Spherical Cap/complete Spherical cap/Bouguer gravity grid of the North Perth Gingin Brook Gravity Survey, 2013 survey to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. The processed data are checked by GA geophysicists using standard methods for assessing quality to ensure that the final data are fit-for-purpose. The first vertical derivative grid is very helpful for the enhancement of near surface features and structural features such as faults and dykes. Details of the specifications of individual surveys held in the Australian National Gravity Database (ANGD) can be found in the Second Edition of the Index of Gravity Surveys (Wynne and Bacchin, 2009).
The original grid was converted from ERMapper (.ers) format to netCDF4_classic format using GDAL1.11.1. The main purpose of this conversion is to enable access to the data by relevant open source tools and software. The netCDF grid was created on 2017-10-19T01:40:05, 2013-12-03T00:00:00.
Intrepid Geophysics. http://www.intrepid-geophysics.com. Wynne, P., and Bacchin, M., 2009. Index of Gravity Surveys (Second Edition). Geoscience Australia, Record 2009/07.
NetCDF file on NCI filesystem for dataset 75f6b05b-5025-4e14-8194-52d36494e8f1
THREDDS catalog page for dataset 75f6b05b-5025-4e14-8194-52d36494e8f1
NCSS for dataset 75f6b05b-5025-4e14-8194-52d36494e8f1
NetCDF file download via HTTP for dataset 75f6b05b-5025-4e14-8194-52d36494e8f1
Zipped ERS file download via HTTP for dataset 75f6b05b-5025-4e14-8194-52d36494e8f1
OPeNDAP service for dataset 75f6b05b-5025-4e14-8194-52d36494e8f1
WCS for dataset 75f6b05b-5025-4e14-8194-52d36494e8f1
WMS for dataset 75f6b05b-5025-4e14-8194-52d36494e8f1
Australian Geophysical Archive Data Delivery System
This North_Perth_Gingin_Brook_Gravity_CSCBA230GUVD_Geodetic_p201360.nc grid includes ground gravity point data for the North Perth Gingin Brook Gravity Survey, 2013 survey acquired for the geological survey of WA