Tanami NS 1F - TMI RTP 1VD grid (AWAGS)

Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data 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 Tanami NS 1F - TMI RTP 1VD grid (AWAGS) is the first vertical derivative of the TMI RTP grid of the NTGS Tanami NS 1F Region Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018 survey.

This grid has a cell size of 0.00018 degrees (approximately 20m) , and given in units of nT per metre (nT/m). The data used to produce the TMI grid was acquired in 2018 by the NT Government, and consisted of 5323 line-kilometres of data at 100m line spacing and 60m terrain clearance. The data has had a variable reduction to the pole applied to centre the magnetic anomaly over the magnetised body. The VRTP processing followed a differential reduction to pole calculation up to 5th order polynomial. Magnetic inclination and declination were derived from the IGRF-11 geomagnetic reference model using a data representative date and elevation representative of the survey. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the TMI RTP grid of the NTGS Tanami NS 1F Region Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018 survey to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. This grid shows the magnetic response of subsurface features with contrasting magnetic susceptibilities. The grid can also be used to locate structural features such as dykes.

Identification info

Date (Creation): 2020-10-31T00:00:00

Date (Publication): 2020-10-31T00:00:00

Date (Revision): 2021-07-05T23:36:50

Citation identifier: Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/144884

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

Temporal extent

Time period: 2018-07-13T00:00:00 2018-10-23T00:00:00

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

Discipline

Earth sciences

Discipline

geophysics

Feature type

grid

Place

Australia

Place

Project

survey 1312

Theme

GADDS2.0

Theme

magnetics

Theme

magnetism

Theme

palaeomagnetism

Theme

airborne digital data

Theme

geophysical survey

Theme

total magnetic intensity

Theme

reduced to the pole

Theme

first vertical derivative

Theme

grid

Theme

greyscale

Theme

image

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) Commonwealth of Australia (Geoscience Australia) and Northern Territory of Australia (Northern Territory Geological Survey) 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: Tanami NS 1F - TMI RTP 1VD grid (AWAGS) NCSS

Website

https://thredds.nci.org.au/thredds/ncss/grid/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/NT/grid/P1312/P1312-grid-tmi_rtp_1vd-Infill1F-AWAGS_MAG_2019.nc/dataset.html

NetCDF Subsetting Service (NCSS) for Tanami NS 1F - TMI RTP 1VD grid (AWAGS)

Associated resource

Association Type: Operated on by

Title: Tanami NS 1F - TMI RTP 1VD grid (AWAGS) OPeNDAP

Website

https://thredds.nci.org.au/thredds/dodsC/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/NT/grid/P1312/P1312-grid-tmi_rtp_1vd-Infill1F-AWAGS_MAG_2019.nc.html

OPeNDAP web service for Tanami NS 1F - TMI RTP 1VD grid (AWAGS)

Associated resource

Association Type: Operated on by

Title: Tanami NS 1F - TMI RTP 1VD grid (AWAGS) WMS

Website

https://thredds.nci.org.au/thredds/wms/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/NT/grid/P1312/P1312-grid-tmi_rtp_1vd-Infill1F-AWAGS_MAG_2019.nc?service=WMS&version=1.3.0&request=GetCapabilities

OGC Web Mapping Service (WMS) for Tanami NS 1F - TMI RTP 1VD grid (AWAGS)

Associated resource

Association Type: Operated on by

Title: Tanami NS 1F - TMI RTP 1VD grid (AWAGS) WCS

Website

https://thredds.nci.org.au/thredds/wcs/iv65/Geoscience_Australia_Geophysics_Reference_Data_Collection/airborne_geophysics/NT/grid/P1312/P1312-grid-tmi_rtp_1vd-Infill1F-AWAGS_MAG_2019.nc?service=WCS&version=1.0.0&request=GetCapabilities

OGC Web Coverage Service (WCS) for Tanami NS 1F - TMI RTP 1VD grid (AWAGS)

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: Tanami NS 1F - TMI RTP 1VD grid (AWAGS) file download

File download for Tanami NS 1F - TMI RTP 1VD grid (AWAGS)

Distribution format

WWW:LINK-1.0-http--link

OnLine resource: Tanami NS 1F - TMI RTP 1VD grid (AWAGS) NCSS

NetCDF Subsetting Service (NCSS) for Tanami NS 1F - TMI RTP 1VD grid (AWAGS)

Distribution format

NCSS

OnLine resource: Tanami NS 1F - TMI RTP 1VD grid (AWAGS) OPeNDAP

OPeNDAP web service for Tanami NS 1F - TMI RTP 1VD grid (AWAGS)

Distribution format

WWW:LINK-1.0-http--opendap

OnLine resource: Tanami NS 1F - TMI RTP 1VD grid (AWAGS) WMS

OGC Web Mapping Service (WMS) for Tanami NS 1F - TMI RTP 1VD grid (AWAGS)

Distribution format

OGC:WMS

OnLine resource: Tanami NS 1F - TMI RTP 1VD grid (AWAGS) WCS

OGC Web Coverage Service (WCS) for Tanami NS 1F - TMI RTP 1VD grid (AWAGS)

Distribution format

OGC:WCS

Resource lineage

Statement

This Tanami NS 1F - TMI RTP 1VD grid (AWAGS) is the first vertical derivative grid of an airborne-derived Total Magnetic Intensity (TMI) Reduced to the Pole (RTP) grid for the NTGS Tanami NS 1F Region Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018 survey. The survey was acquired under the project No. 1312 for the geological survey of NT. A total of 5323 line-kilometres of data at a line spacing of 100m were acquired to produce the TMI grid. The data has had a variable reduction to the pole applied to centre the magnetic anomaly over the magnetised body. The VRTP processing followed a differential reduction to pole calculation up to 5th order polynomial. Magnetic inclination and declination were derived from the IGRF-11 geomagnetic reference model using a data representative date and elevation representative of the survey. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the TMI RTP grid of the NTGS Tanami NS 1F Region Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018 survey to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. The image shows the magnetic response of subsurface features with contrasting magnetic susceptibilities. The image can also be used to locate structural features such as dykes. Details of the specifications of individual airborne surveys can be found in the Fourteenth Edition of the Index of Airborne Geophysical Surveys (Percival, 2014). This Index is also available online at http://pid.geoscience.gov.au/dataset/79134.

References

Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).

Intrepid Geophysics http://intrepid-geophysics.com

Hierarchy level: Dataset

Description: This Tanami NS 1F - TMI RTP 1VD grid (AWAGS) is the first vertical derivative grid of an airborne-derived TMI RTP data for the NTGS Tanami NS 1F Region Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018 survey acquired for the geological survey of NT

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/66c57506-4790-4cf3-a584-d3ce817dce38

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 - Airborne Geophysics

Citation identifier: ddeb0fc4-32e3-4913-80f2-f4249b17a925

Citation identifier: 111301

Type of resource

Resource scope: Dataset

Name: Tanami NS 1F - TMI RTP 1VD grid (AWAGS)

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier: eCatId/144884

Metadata linkage

http://rhe-ecat-prod01.prod.lan:8080/geonetwork/srv/eng/search?uuid=66c57506-4790-4cf3-a584-d3ce817dce38

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

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Read here the full details and access to the data.

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