Product catalogue
NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um
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 NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the NTGS Pedirka Gravity Survey (P202381). This gravity survey was acquired under the project No. 202381 for the geological survey of NT. The grid has a cell size of 0.00944 degrees (approximately 1000m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 11443 gravity stations at a spacing between 2000m and 4000m were acquired to produce this grid.
Simple
Identification info
- Date (Creation)
- 2023-10-04T00:00:00
- Date (Publication)
- 2023-10-04T00:00:00
- Date (Revision)
- 2024-04-12T06:20:50
- Citation identifier
- Digital Object Identifier/https://dx.doi.org/10.26186/149433
- Cited responsible party
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Role Organisation / Individual Name Details Author Geophysical Acquisition & Processing Section
Publisher Commonwealth of Australia (Geoscience Australia)
Voice
- Purpose
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The Pedirka gravimetric survey was carried out as part of the exploration for the future (EFTF) program as a collaboration between the Northern Territory Geological Survey (NTGS) and Geoscience Australia. This survey forms part of the NTGS’s Resourcing the Territory Initiative, which aims to support resource exploration in the NT.
- Status
- Completed
- Point of contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice facsimile Point of contact Wynne, P.
MEG Internal Contact Resource provider Minerals, Energy and Groundwater Division
External Contact
- Topic category
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- Geoscientific information
Extent
))
Temporal extent
- Time period
- 2023-05-30T00:00:00 2023-09-08T00:00:00
- Maintenance and update frequency
- Not planned
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- theme.ANZRC Fields of Research.rdf
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EARTH SCIENCES
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- Data centre
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NCI
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- Discipline
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Earth sciences
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- Discipline
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geophysics
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- Feature type
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grid
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- Place
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Australia
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- Place
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NT
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- Project
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survey 202381
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- Theme
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GADDS2.0
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- Theme
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gravity
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- Theme
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spherical cap
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- Theme
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Bouguer
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- Theme
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complete
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- Theme
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1VD
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- Theme
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first vertical derivative
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- Theme
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ground digital data
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- Theme
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geophysical survey
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- Theme
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grav
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- Theme
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grid
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- Theme
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raster
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Access constraints
- License
- Use constraints
- License
- Other constraints
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Commonwealth of Australia (Geoscience Australia) and Northern Territory of Australia (Northern Territory Geological Survey) 2023
Resource constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Associated resource
Associated resource
- Association Type
- Operated on by
- Title
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NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um OPeNDAP
Associated resource
Associated resource
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Geoscience Australia
Voice
- OnLine resource
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File available for download in various formats from the GADDS2 portal
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.
- Distribution format
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WWW:LINK-1.0-http--link
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- Distributor contact
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Role Organisation / Individual Name Details Distributor National Computational Infrastructure
Voice
- OnLine resource
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NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um file download
File download for NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um
- Distribution format
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WWW:LINK-1.0-http--link
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- OnLine resource
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NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um NCSS
NetCDF Subsetting Service (NCSS) for NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um
- Distribution format
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NCSS
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- OnLine resource
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NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um OPeNDAP
OPeNDAP web service for NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um
- Distribution format
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WWW:LINK-1.0-http--opendap
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- OnLine resource
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NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um WMS
OGC Web Mapping Service (WMS) for NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um
- Distribution format
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OGC:WMS
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- OnLine resource
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NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um WCS
OGC Web Coverage Service (WCS) for NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um
- Distribution format
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OGC:WCS
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Resource lineage
- Statement
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This NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the NTGS Pedirka Gravity Survey (P202381). This gravity survey was acquired under the project No. 202381 for the geological survey of NT. The grid has a cell size of 0.00944 degrees (approximately 1000m). A total of 11443 gravity stations at a spacing between 2000m and 4000m were acquired to produce this grid. Three processes are required to correct the gravity observations for the effects of the surrounding topography: (1) a Bouguer correction (Bullard A), which approximates the topography as an infinite horizontal slab; (2) a correction to that horizontal slab for the curvature of the Earth (Bullard B); and (3) a terrain correction (Bullard C), which accounts for the undulations of the surrounding topography. The complete spherical cap Bouguer gravity anomalies were calculated by applying terrain correction (Bullard C) to the spherical cap Bouguer anomaly point data of NTGS Pedirka Gravity Survey (P202381). These terrain corrections were calculated using software from INTREPID Geophysics. The Intrepid algorithm utilises concentric rings subdivided into cells (Direen, 2001) to calculate the terrain correction. The terrain corrected data were then gridded using a gridding technique provided by the INTREPID Geophysics software package. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the Bouguer gravity grid of the NTGS Pedirka Gravity Survey (P202381) 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. 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.
- Hierarchy level
- Dataset
- Description
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This NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um includes ground gravity data for the NTGS Pedirka Gravity Survey (P202381) acquired for the geological survey of NT
Reference System Information
- Reference system identifier
- EPSG/GDA94 (EPSG:4283)
Metadata constraints
- Title
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Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/05d93f8b-5db2-4028-9c9a-4ad96b05985e
- Title
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GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice facsimile Point of contact Manager Client Services
Point of contact Wynne, P.
MEG Internal Contact
- Title
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Geophysical Data Collection - gravity
- Citation identifier
- c6b58f54-102c-19e9-e044-00144fdd4fa6
- Citation identifier
- 74512
Type of resource
- Resource scope
- Dataset
- Name
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NTGS Pedirka Gravity 202381 Complete Spherical Cap Bouguer Anomaly 1VD CSCBA267um
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/149433
- Date info (Creation)
- 2024-04-10T00:00:00
- Date info (Revision)
- 2024-04-10T00:00:00
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
-
Version 2.0, September 2018
- Citation identifier
- http://pid.geoscience.gov.au/dataset/ga/122551