Brief description
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 p200750 PACE Northern Olympic Domain Gravity slab Bouguer 1vd is a first vertical derivative of the Bouguer anomaly grid for the 2007 PACE Northern Olympic Domain Gravity Survey, SA (P200750) survey. This gravity survey was acquired under the project No. 200750 for the geological survey of SA. The grid has a cell size of 0.00185 degrees (approximately 192m). A total of 38881 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.
Lineage
Maintenance and Update Frequency: notPlanned
Statement: This p200750 PACE Northern Olympic Domain Gravity slab Bouguer 1vd is a first vertical derivative grid of the Bouguer anomaly for the 2007 PACE Northern Olympic Domain Gravity Survey, SA (P200750) survey. This gravity survey was acquired under the project No. 200750 for the geological survey of SA. The grid has a cell size of 0.00185 degrees (approximately 192m). A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the Bouguer gravity grid of the 2007 PACE Northern Olympic Domain Gravity Survey, SA (P200750) 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).
References:
Intrepid Geophysics, http://www.intrepid-geophysics.com;
Wynne, P., and Bacchin, M., 2009. Index of Gravity Surveys (Second Edition). Geoscience Australia, Record 2009/07.
References:
Intrepid Geophysics, http://www.intrepid-geophysics.com;
Wynne, P., and Bacchin, M., 2009. Index of Gravity Surveys (Second Edition). Geoscience Australia, Record 2009/07.
Created: 09 03 2020
Issued: 09 03 2020
Modified: 05 07 2021
Data time period: 16 05 2007 to 22 09 2007
text: westlimit=134.52; southlimit=-30.8658; eastlimit=138.2256; northlimit=-27.0511; projection=GDA94 (EPSG:4283)
Subjects
1VD |
Australia |
Bouguer |
EARTH SCIENCES |
Earth sciences |
GADDS2.0 |
NCI |
Published_External |
SA |
first vertical derivative |
geophysical survey |
geophysics |
geoscientificInformation |
grav |
gravity |
grid |
ground digital data |
infinite slab |
raster |
survey 200750 |
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Other Information
The Geophysical Archive Data Delivery System (GADDS2) portal provides HTTP download of geophysics datasets in a number of formats. Point and line datasets are available in NetCDF and ASEG-GDF2. Grid datasets are available in NetCDF, GeoTIFF and ERS. (File available for download in various formats from the GADDS2 portal)
Identifiers
- global : e84bb847-0eab-4c63-8c4f-3bb758c436c5
- URI : http://pid.geoscience.gov.au/dataset/ga/143992
