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National Gravity and Magnetic Derivatives Customised for Data Analysis and Machine Learning

<div><strong>Purpose</strong></div><div>This package comprises a set of 86 thematic grids (rasters) derived from national coverages of gravity and magnetic survey data. These datasets provide valuable information about the distribution of geological features, physical property variations, and the composition of the Earth's crust. All grids have been resampled to the same cell size, map extent, and projection to allow them to be integrated into predictive mapping and modelling workflows using machine learning. Users can download individual grids or the whole grid package. </div><div>&nbsp;</div><div><strong>Input Data</strong></div><div>The following Australian national datasets were used:</div><div>1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2019 Australian National Gravity Grids: Free Air Anomaly, Complete Bouguer Anomaly, De-trended Global Isostatic Residual, 400 m cell size (Lane <em>et al</em>., 2020).</div><div>2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Total Magnetic Intensity (TMI) Grid of Australia 2019 - seventh edition Enhanced Products Package (Morse, 2020).</div><div><br></div><div><strong>Processing</strong></div><div>All processing of the national grids were undertaken using Intrepid software. The following was performed on the input data:</div><div>1.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The grids were reprojected from GDA94 geodetic to Australian Albers (EPSG 3577). </div><div>2.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The grids were aligned to the same grid cell registration point and interpolated to fit within an 80 m cell size using a cubic spline method to ensure that the cell locations for all images are common.</div><div>3.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Various Fast Fourier Transforms (FFT) were applied to each grid (see ‘Grids_for_Machine_Learning_dataset_notes.pdf’). </div><div>&nbsp;</div><div><strong>Metadata (all grids)</strong></div><div>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Datum: GDA94</div><div>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Projection: Australian Albers (EPSG 3577)</div><div>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Cell size: 80 m</div><div>·&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;File format: GeoTiff (.tif)</div>

<b>Data is available on request from clientservices@ga.gov.au - Quote eCat# 149130</b> clientservices@ga.gov <b>Data is available on request from clientservices@ga.gov.au - Quote eCat# 149130</b>

Simple

Identification info

Date (Creation)
2024-07-01T20:00:00
Date (Publication)
2024-07-08T07:02:56
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/149130

Citation identifier
Digital Object Identifier/https://dx.doi.org/10.26186/149130

Cited responsible party
Role Organisation / Individual Name Details
Publisher

Commonwealth of Australia (Geoscience Australia)

Voice
Author

Miller, R.

Internal Contact
Author

Goodwin, J.

Internal Contact
Author

Wilford, J.

Internal Contact
Author

McInnes, D.

External Contact
Purpose

Grids created for input into data analysis and machine learning projects. See 'Grids_for_Machine_Learning_dataset_notes.pdf' for a list of all grids.

Status
Completed
Point of contact
Role Organisation / Individual Name Details
Resource provider

Minerals, Energy and Groundwater Division

External Contact
Point of contact

Commonwealth of Australia (Geoscience Australia)

Voice
Point of contact

Schroder, I.

MEG Internal Contact
Spatial representation type
Topic category
  • Geoscientific information

Extent

N
S
E
W


Maintenance and update frequency
As needed

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

Project
  • Geophysical Acquisition and Processing Section

Keywords
  • machine learning

Keywords
  • grids

Keywords
  • raster

Keywords
  • Total Magnetic Intensity

Keywords
  • TMI

Keywords
  • gravity

Keywords
  • Reduction to Pole

Keywords
  • RTP

Keywords
  • analytic signal

Keywords
  • tilt

Keywords
  • phase map

Keywords
  • residual

Keywords
  • upward continuation

Keywords
  • vertical integral

Keywords
  • De-trended Global Isostatic Residual

Keywords
  • DGIR

Keywords
  • Free-Air Anomaly

Keywords
  • FAA

Keywords
  • Complete Bouguer Anomaly

Keywords
  • horizontal derivative

Keywords
  • band pass

Keywords
  • vertical derivative

theme.ANZRC Fields of Research.rdf
  • Magnetism and palaeomagnetism

  • Gravimetrics

Keywords
  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

https://creativecommons.org/licenses/by/4.0/

Addressee
Role Organisation / Individual Name Details
User

Any

Use constraints
License
Use constraints
Other restrictions
Other constraints

© Commonwealth of Australia (Geoscience Australia) 2024

Resource 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
Classification system

Australian Government Security Classification System

Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

Voice facsimile
OnLine resource

Download the document (pdf)

Download the document (pdf)

Distribution format
  • pdf

    File decompression technique

    nil

Resource lineage

Statement

<div>This dataset publication was created by the Geophysical Acquisition and Processing (GAP) and Integrated Geological Mapping (IGM) sections at Geoscience Australia in 2024. Please refer to the release notes (Grids_for_Machine_Learning_dataset_notes.pdf) for a description of how the data were processed.</div>

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/3a953681-9ec4-4f37-a986-b9c0e1b644ea

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

Schroder, I.

MEG Internal Contact

Type of resource

Resource scope
Dataset

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/149130

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/3a953681-9ec4-4f37-a986-b9c0e1b644ea

Date info (Creation)
2024-07-08T06:54:41
Date info (Revision)
2024-07-08T06:54:41

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
http://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

Geophysical Acquisition and Processing Section
theme.ANZRC Fields of Research.rdf
Gravimetrics Magnetism and palaeomagnetism

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