Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

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.

This Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD is the first vertical derivative of the spheical cap Bouguer anomaly grid for the Sir Samuel Throssell Gravity Survey (P201460). This gravity survey was acquired under the project No. 201460 for the geological survey of WA. The grid has a cell size of 0.00477 degrees (approximately 499m). A total of 11659 gravity stations at 2500m spacing were acquired to produce this grid. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.

Simple

Identification info

Date (Creation)
2020-03-07T00:00:00
Date (Publication)
2020-03-07T00:00:00
Date (Revision)
2021-07-05T06:05:32
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/143903

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
2014-06-19T00:00:00 2014-09-06T00:00:00
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 201460

Theme

  • GADDS2.0

Theme

  • gravity

Theme

  • spherical cap

Theme

  • Bouguer

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

Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD NCSS

Website

https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/WA/grid/P201460/P201460-grid-grv_scba_1vd.nc/dataset.html

NetCDF Subsetting Service (NCSS) for Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

Associated resource

Association Type
Operated on by
Title

Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD OPeNDAP

Website

https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/WA/grid/P201460/P201460-grid-grv_scba_1vd.nc.html

OPeNDAP web service for Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

Associated resource

Association Type
Operated on by
Title

Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD WMS

Website

https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/WA/grid/P201460/P201460-grid-grv_scba_1vd.nc?service=WMS&version=1.3.0&request=GetCapabilities

OGC Web Mapping Service (WMS) for Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

Associated resource

Association Type
Operated on by
Title

Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD WCS

Website

https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/ground_gravity/WA/grid/P201460/P201460-grid-grv_scba_1vd.nc?service=WCS&version=1.0.0&request=GetCapabilities

OGC Web Coverage Service (WCS) for Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

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

Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD file download

File download for Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

Distribution format

  • WWW:LINK-1.0-http--link

OnLine resource

Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD NCSS

NetCDF Subsetting Service (NCSS) for Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

Distribution format

  • NCSS

OnLine resource

Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD OPeNDAP

OPeNDAP web service for Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

Distribution format

  • WWW:LINK-1.0-http--opendap

OnLine resource

Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD WMS

OGC Web Mapping Service (WMS) for Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

Distribution format

  • OGC:WMS

OnLine resource

Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD WCS

OGC Web Coverage Service (WCS) for Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

Distribution format

  • OGC:WCS

Resource lineage

Statement

This Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD is the first vertical derivative of the spherical cap Bouguer anomaly grid for the Sir Samuel Throssell Gravity Survey (P201460). This gravity survey was acquired under the project No. 201460 for the geological survey of WA. The grid has a cell size of 0.00477 degrees (approximately 499m). A total of 11659 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 Spherical Cap Bouguer gravity anomalies were calculated by applying Bullard A and Bullard B corrections to the free air anomalies using a density of 2670 kg per cubic metre. These data were then gridded using the nearest neighbour algorithm from 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 Sir Samuel Throssell Gravity Survey (P201460) 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 final Spherical cap Bouguer anomalies grid contains data values which account for a correction due to the shape or curvature of the Earth, and provide a more accurate representation of crustal density variations beneath the Earth's surface. 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 Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD includes ground gravity point data for the Sir Samuel Throssell Gravity Survey (P201460) 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/e72efcc6-db70-49a8-b027-841576edb59b

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

Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/143903

Metadata linkage

http://rhe-ecat-prod01.prod.lan:8080/geonetwork/srv/eng/search?uuid=e72efcc6-db70-49a8-b027-841576edb59b

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 first vertical derivative geophysical survey geophysics grav gravity grid grid ground digital data raster spherical cap survey 201460
theme.ANZRC Fields of Research.rdf
EARTH SCIENCES

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Associated resources

Not available