West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic

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 West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the West Murchison Gravity Survey (P201260). This gravity survey was acquired under the project No. 201260 for the geological survey of WA. The grid has a cell size of 0.00478 degrees (approximately 499m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 11816 gravity stations at 2500m spacing were acquired to produce this grid.

Simple

Identification info

Date (Creation)
2020-03-09T00:00:00
Date (Publication)
2020-03-09T00:00:00
Date (Revision)
2021-07-05T06:05:43
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/143940

Cited responsible party
Role Organisation / Individual Name Details
Author

Geophysical Acquisition & Processing Section
Status
Completed
Point of contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Topic category
  • Geoscientific information

Extent

N
S
E
W


Temporal extent

Time period
2012-09-02T00:00:00 2012-11-13T00:00:00
Maintenance and update frequency
Not planned

Resource format

Title

Product data repository: Various Formats

Website

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

  • EARTH SCIENCES

Data centre

  • NCI

Discipline

  • Earth sciences

Discipline

  • geophysics

Feature type

  • grid

Place

  • Australia

Place

  • WA

Project

  • survey 201260

Theme

  • GADDS2.0

Theme

  • gravity

Theme

  • spherical cap

Theme

  • Bouguer

Theme

  • complete

Theme

  • 1VD

Theme

  • first vertical derivative

Theme

  • ground digital data

Theme

  • geophysical survey

Theme

  • grav

Theme

  • grid

Theme

  • raster

Keywords

  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License
Other constraints

(c) State of Western Australia (Department of Mines, Industry Regulation and Safety) 2020

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Associated resource

Association Type
Operated on by
Title

West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic NCSS

Website

https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/WA/grid/P201260/P201260-grid-grv_cscba_1vd.nc/dataset.html

NetCDF Subsetting Service (NCSS) for West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic

Associated resource

Association Type
Operated on by
Title

West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic OPeNDAP

Website

https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/WA/grid/P201260/P201260-grid-grv_cscba_1vd.nc.html

OPeNDAP web service for West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic

Associated resource

Association Type
Operated on by
Title

West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic WMS

Website

https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/WA/grid/P201260/P201260-grid-grv_cscba_1vd.nc?service=WMS&version=1.3.0&request=GetCapabilities

OGC Web Mapping Service (WMS) for West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic

Associated resource

Association Type
Operated on by
Title

West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic WCS

Website

https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/WA/grid/P201260/P201260-grid-grv_cscba_1vd.nc?service=WCS&version=1.0.0&request=GetCapabilities

OGC Web Coverage Service (WCS) for West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic

Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Geoscience Australia

 Voice
OnLine resource

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

  • WWW:LINK-1.0-http--link

Distributor contact
Role Organisation / Individual Name Details
Distributor

National Computational Infrastructure

 Voice
OnLine resource

West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic file download

File download for West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic

Distribution format

  • WWW:LINK-1.0-http--link

OnLine resource

West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic NCSS

NetCDF Subsetting Service (NCSS) for West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic

Distribution format

  • NCSS

OnLine resource

West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic OPeNDAP

OPeNDAP web service for West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic

Distribution format

  • WWW:LINK-1.0-http--opendap

OnLine resource

West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic WMS

OGC Web Mapping Service (WMS) for West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic

Distribution format

  • OGC:WMS

OnLine resource

West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic WCS

OGC Web Coverage Service (WCS) for West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic

Distribution format

  • OGC:WCS

Resource lineage

Statement

This West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the West Murchison Gravity Survey (P201260). This gravity survey was acquired under the project No. 201260 for the geological survey of WA. The grid has a cell size of 0.00478 degrees (approximately 499m). A total of 11816 gravity stations at 2500m spacing 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 West Murchison Gravity Survey (P201260). 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 West Murchison Gravity Survey (P201260) 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

This West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic includes ground gravity data for the West Murchison Gravity Survey (P201260) acquired for the geological survey of WA

Reference System Information

Reference system identifier
EPSG/GDA94 (EPSG:4283)

Metadata constraints

Title

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/2e293af4-b453-4a12-9002-4806c8c15ca9

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Point of contact

Manager Client Services
Title

Geophysical Data Collection - gravity

Citation identifier
c6b58f54-102c-19e9-e044-00144fdd4fa6

Citation identifier
74512

Type of resource

Resource scope
Dataset
Name

West Murchison Gravity Complete Spherical Cap Bouguer 1VD Grid Geodetic

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/143940

Metadata linkage

http://rhe-ecat-prod01.prod.lan:8080/geonetwork/srv/eng/search?uuid=2e293af4-b453-4a12-9002-4806c8c15ca9

Date info (Creation)
2021-06-17T00:00:00
Date info (Revision)
2021-06-17T00:00:00

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

1VD Bouguer Earth sciences GADDS2.0 NCI complete first vertical derivative geophysical survey geophysics grav gravity grid grid ground digital data raster spherical cap survey 201260
theme.ANZRC Fields of Research.rdf
EARTH SCIENCES

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Access to the portal

Associated resources

Not available