Regional Geophysical Surveys

On this page, the Geological Survey of Western Australia provides georeferenced images of regional datasets (often merged with previously flown data from government and non-confidential company surveys), and preliminary grids and images from surveys in progress.

GSWA has an arrangement with Geoscience Australia (GA) whereby final point-located (‘vector’) data and grids from regional surveys can be downloaded free of charge from GA's Geophysical Archive Data Delivery System (GADDS). The data on physical media can be purchased from GA's Sales Centre.

ECW files can be viewed using ER Viewer or various GIS applications. Download ER Viewer free of charge from ER Mapper.

Page Index

Grids and Images

Windimurra 2008 regional gravity survey

Date released: 20 November 2008

Final images and grids of data from regional ground gravity survey (2.5 km regular grid of stations) completed in September 2008 merged with data from the Murchison 2006 regional survey.

Point-located (‘vector’) data and grids from this survey (unmerged) can be purchased from Geoscience Australia or downloaded free of charge from GA's Geophysical Archive Data Delivery System (GADDS).

Grids and images of merged Bouguer Anomaly, First Vertical Derivative and Height (DEM). Grids are in ER Mapper format with a cell size of 500m. Images are in ecw format. The gravity images are illuminated from overhead (azimuth 0°, elevation 90°) and the DEM image is illuminated from north east (azimuth 45°, elevation 45°).


Point-located (‘vector’) data for Windimurra 2008 survey only.	View or download file ZIP, 3 Mb
Survey Operations Report	View or download file PDF, 12 Mb

SWCC Dumbleyung 2008 detailed airborne magnetic and radiometric survey — preliminary data

Date released: 4 September 2008

Images and grids of uncorrected and unlevelled total magnetic intensity, radiometric count rates and elevation from flying funded by the Southwest Catchments Council (SWCC) and completed in July 2008. Survey line spacing: 100 m; height: 40 m; direction: N-S.

The final data set for this survey is expected to be ready for release in October 2008. Subscribe to the GSWA newsletter to be kept advised of the precise release date.

SWCC Dumbleyung 2008 detailed airborne magnetic and radiometric survey — preliminary data


Images in ECW format: TMI, DEM, Ternary Radiometric	View or download file ZIP, 11 Mb
Data Grid in ER Mapper format: TMI	View or download file ZIP, 33 Mb
Data Grids in ER Mapper : Total Count	View or download file ZIP, 33 Mb
Data Grids in ER Mapper: Potassium	View or download file ZIP, 33 Mb
Data Grids in ER Mapper: Uranium, Thorium.	View or download file ZIP, 33 Mb
Data Grids in ER Mapper: Thorium.	View or download file ZIP, 33 Mb

Byro 2008 airborne magnetic and radiometric survey — final data

Date released: 25 September 2008

Grids and images of data from the Byro 2008 survey (line spacing: 400 m; height: 60 m; direction: E-W) merged with previously flown data from government and non-confidential company surveys. The total magnetic intensity (TMI) and digital elevation model (DEM) images are illuminated from the northeast (azimuth 90 degrees, elevation 45 degrees). Ternary radiometric image is potassium, thorium, and uranium displayed as red, green, and blue. The data have been compressed 10:1 using enhanced compressed wavelet technology.


Images in ECW format: TMI, DEM, Ternary Radiometric	View or download file ZIP, 6.1 Mb
Data Grids in ER Mapper format: TMI, DEM, Total Count, Potassium, Uranium, Thorium.	View or download file ZIP, 116 Mb

Musgrave 2008 gravity survey

Date released: 7 August 2008

The data were acquired in May and June 2008 (at a 2.5 km regular grid of stations) and are available for download from the Geoscience Australia Geophysical Archive Data Delivery System (GADDS). GSWA provides a data package consisting of the survey operations report and located dataset, and a compilation of the new data merged with pre-existing data at approximately the same level detail in the form of grids and ecw images of Bouguer Anomaly and First Vertical Derivative. The images are illuminated from overhead (azimuth 0 degrees, elevation 90 degrees).


Musgrave 2008 gravity survey	View or download file ZIP, 29Mb

South Kimberley 2007 airborne magnetic and radiometric survey

Date released: 20 November 2008 Final images and grids of data acquired between January and October 2008 (400 m line spacing) merged with previously flown company data. Final point-located (‘vector’) data and grids from this survey (unmerged) can be purchased from Geoscience Australia or downloaded free of charge from GA's Geophysical Archive Data Delivery System (GADDS).


Survey Operations Report	View or download file PDF, 3MB
Images in ECW format: MAG, DEM, Ternary Radiometric	View or download file ZIP, 15 MB
Data Grid in ERS format: MAG	View or download file ZIP, 23 MB
Data Grid in ERS format: MAG RTP	View or download file ZIP, 36 MB
Data Grid in ERS format: MAG RTP 1VD	View or download file ZIP, 37 MB
Data Grid in ERS format: DEM	View or download file ZIP, 34 MB
Data Grid in ERS format: Total Count	View or download file ZIP, 22 Mb
Data Grid in ERS format: Potassium	View or download file ZIP, 35 Mb
Data Grid in ERS format: Uranium	View or download file ZIP, 34 Mb
Data Grid in ERS format: Thorium	View or download file ZIP, 35 Mb

Radiometric anomaly grids (80m) of Western Australia, Version 1 — 2008

Merged radiometric grids of potassium, thorium and uranium with 80m cell size generated from Federal and State government data sets acquired with a line spacing of 500 metres or less and selected open file data sets. Subsequent editions will fill in gaps as new data become available. These 80m grids complement the radiometric grids at 250m cell size for the whole of continental Australia presently being compiled by Geoscience Australia. The (as yet unpublished) GA grids have been used as a base reference in compiling the Western Australian 80m grids. The complete dataset is approximately 4 Gb in size (1.4 Gb for each of the three grids) and, at present, is only available on DVD or external hard drive from GSWA (for $99); it is not available by download from the Geoscience Australia GADDS facility.


Download ternary image as ecw (no charge)	View or download file ecw, 40 mb

Ashburton Basin 2006 airborne magnetic and radiometric survey

Final data grids and images (ER Mapper and ECW format) - Data released: 4 April 2007

This release combines grids and images of the new data merged with previously flown data from government and non-confidential company surveys. The DEM image is from new data merged with SRTM data. The total magnetic intensity (TMI) and digital elevation model (DEM) images are illuminated from the northeast (azimuth 90 degrees, elevation 45 degrees). Ternary radiometric image is potassium, thorium, and uranium displayed as red, green, and blue. The data have been compressed 10:1 using enhanced compressed wavelet technology. Note: Final point-located (‘vector’) data and grids from this survey (unmerged) can be purchased from Geoscience Australia or downloaded free of charge from GA's Geophysical Archive Data Delivery System (GADDS).


MAG image in ECW format	View or download file ECW, 1.8 MB
DEM image in ECW format	View or download file ECW, 1.8 MB
KTU image in ECW format	View or download file ECW, 1.6 MB
Total Count image in ECW format	View or download file ECW, 2.3 MB
Potassium image in ECW format	View or download file ECW, 2.6 MB
Thorium grid in ERS format	View or download file ECW, 2.5 MB
Uranium grid in ERS format	View or download file ECW, 3.1 MB
All images	View or download file ZIP, 16.2 MB
MAG grid in ERS format	View or download file ZIP, 26 Mb
DEM grid in ERS format	View or download file ZIP, 36 MB
Total Count grid in ERS format	View or download file ZIP, 26 MB
Potassium grid in ERS format	View or download file ZIP, 14 MB
Thorium image in ECW format	View or download file ZIP, 26 MB
Uranium image in ECW format	View or download file ZIP, 26 MB

Bouguer gravity anomaly image of Western Australia Image as .ecw file

The image was generated from a colour palette (white high, blue low) using a linear histogram. To emphasize the expression of high-frequency anomalies, an artificial illumination was applied from overhead (70° azimuth, 80° elevation). Grid cell size is approximately 850 m. The data have been compressed 10:1 using enhanced compressed wavelet technology.


Metadata for the image is available as a Word document.	View or download file doc, 36 kb
Download image	View or download file ZIP, 1 Mb

East Yilgarn final airborne magnetic, radiometric, and elevation images

Images as .ecw files — free on web Total magnetic intensity (TMI) and digital terrain model (DTM) images are illuminated from the northeast (azimuth 90 degrees, elevation 45 degrees). Ternary radiometric image is potassium, thorium, and uranium displayed as red, green, and blue. The data have been compressed 10:1 using enhanced compressed wavelet technology.


TMI image as ECW file	View or download file ZIP, 2.4 Mb
DTM image as ECW file	View or download file ZIP, 2.2 Mb
Ternary radiometric image as ECW file	View or download file ZIP, 2.5 Mb

Gascoyne 2005 final airborne magnetic, radiometric, and elevation images


TMI image as ECW file	View or download file ZIP, 1.9 Mb
DTM image as ECW file	View or download file ZIP, 641 kb
Ternary radiometric image as ECW file	View or download file ZIP, 1.1 Mb

Murchison 2007 gravity survey — Final data

Data released: 15 May 2007 Digital data can be purchased from Geoscience Australia or downloaded from GA's Geophysical Archive Data Delivery System (GADDS). GSWA provides two ZIP files for download, containing Survey Operations Report, data and images of Bouguer Anomaly and First Vertical Derivative. The images are illuminated from overhead (azimuth 0 degrees, elevation 90 degrees ).


Data package	View or download file ZIP, 1.58 MB
Report package	View or download file ZIP, 4.12 MB

Musgrave extensions airborne magnetic and radiometric survey data — final data

Digital data are available from Geoscience Australia, or download free of charge through Geoscience Australia's Geophysical Archive Data Delivery System (GADDS). The images listed below are made from the latest data release merged with previously acquired regional government data and Open File company surveys. All images are in ECW format, compressed 10:1 using enhanced compressed wavelet technology. Total magnetic intensity (TMI) is illuminated from the northeast (azimuth 90 degrees, elevation 45 degrees). Ternary radiometric image is potassium, thorium, and uranium displayed as red, green, and blue.


Musgrave Region — TMI image in ECW format	View or download file ZIP, 2.1 Mb
Musgrave Region — Ternary radiometric image in ECW format	View or download file ZIP, 2.3 Mb
Musgrave Region — Total count image in ECW format	View or download file ZIP, 3.1 Mb
Musgrave Region - Uranium image in ECW format	View or download file ZIP, 5.2 Mb
Musgrave Region — Thorium image in ECW format	View or download file ZIP, 3.4 Mb
Musgrave Region — Potassium image in ECW format	View or download file ZIP, 2.6 Mb

North Paterson digital elevation model image

Digital data available from Geoscience Australia, or download free of charge through Geoscience Australia’s Geophysical Archive Data Delivery System.


Image as .ecw file - free on web	View or download file ECW, 2.06 Mb

North Paterson ternary radiometric image

Digital data available from Geoscience Australia, or download free of charge through Geoscience Australia’s Geophysical Archive Data Delivery System


Image as .ecw file - free on web	View or download file ECW, 1.52 Mb

North Paterson total magnetic intensity image

Digital data available from Geoscience Australia, or download free of charge through Geoscience Australia’s Geophysical Archive Data Delivery System.


Image as .ecw file — free on web	View or download file ECW, 940 kb

Officer Basin airborne magnetic and radiometric survey

Final data grids and images in ER Mapper and ECW format
Data released: 28 March 2007 These grids and images contain the new data merged with previously flown data from government and non-confidential company surveys. The DEM image is from new data merged with SRTM data. The total magnetic intensity (TMI) and digital elevation model (DEM) images are illuminated from the northeast (azimuth 90 degrees, elevation 45 degrees). Ternary radiometric image is potassium, thorium, and uranium displayed as red, green, and blue. The data have been compressed 10:1 using enhanced compressed wavelet technology. Note: Final point-located (‘vector’) data and grids from this survey (unmerged) can be purchased from Geoscience Australia or downloaded free of charge from GA's Geophysical Archive Data Delivery System (GADDS).


MAG image in ECW format	View or download file ZIP, 2.04 MB
DEM image in ECW format	View or download file ZIP, 5.82 MB
KTU image in ECW format	View or download file ZIP, 3.98 MB
Total Count image in ECW format	View or download file ZIP, 4.64 MB
Potassium image in ECW format	View or download file ZIP, 4.05 MB
Thorium image in ECW format	View or download file ZIP, 3.29 MB
Uranium image in ECW format	View or download file ZIP, 4.36 MB
MAG grid in ERS format	View or download file ZIP, 31 MB
DEM grid in ERS format	View or download file ZIP, 9.3 MB
Total Count grid in ERS format	View or download file ZIP, 110 Mb
Potassium grid in ERS format	ZIP, 113 MB
Thorium grid in ERS format	View or download file ZIP, 43 MB
Uranium grid in ERS format	View or download file ZIP, 43 MB

Paterson Bouguer image

ERMapper grid of final data from the Paterson Gravity Survey 2005 (GA4025). Bouguer gravity (Illumination: Azimuth 48, Elevation 75).

The data have been compressed 20:1 using enhanced compressed wavelet technology.

Digital data available from Geoscience Australia, or download free of charge through Geoscience Australia’s Geophysical Archive Data Delivery System.


Image as .ecw file - free on web	View or download file ECW, 142 Kb

Paterson Bouguer first vertical derivative image

ERMapper grid of final data from the Paterson Gravity Survey 2005 (GA4025). First vertical derivative of Bouguer gravity (Illumination: Azimuth 48, Elevation 75).

The data have been compressed 20:1 using enhanced compressed wavelet technology.

Digital data available from Geoscience Australia , or download free of charge through Geoscience Australia’s Geophysical Archive Data Delivery System.


Image as .ecw file — free on web	View or download file ECW, 148 Kb

Paterson Bouguer gravity and elevation image

ERMapper grid of final data from the Paterson Gravity Survey 2005 (GA4025). Bouguer gravity (colour) draped over elevation from station heights (shaded) (Illumination: Azimuth 45, Elevation 45).

The data have been compressed 20:1 using enhanced compressed wavelet technology.

Digital data available from Geoscience Australia, or download free of charge through Geoscience Australia’s Geophysical Archive Data Delivery System.


Image as .ecw file — free on web	View or download file ECW, 137 Kb

Paterson Bouguer gravity first vertical derivative and elevation image

ERMapper grid of final data from the Paterson Gravity Survey 2005 (GA4025). First vertical derivative of Bouguer gravity (colour) draped over elevation from station heights (shaded) (Illumination: Azimuth 45, Elevation 45).

The data have been compressed 20:1 using enhanced compressed wavelet technology.

Digital data available from Geoscience Australia, or download free of charge through Geoscience Australia’s Geophysical Archive Data Delivery System.


Image as .ecw file — free on web	View or download file ECW, 149 Kb

Paterson elevation image

ERMapper grid of final data from the Paterson Gravity Survey 2005 (GA4025). Elevation from station heights (Illumination: Azimuth 45, Elevation 45).

The data have been compressed 20:1 using enhanced compressed wavelet technology.

Digital data available from Geoscience Australia, or download free of charge through Geoscience Australia’s Geophysical Archive Data Delivery System.


Image as .ecw file — free on web	View or download file ECW, 134 Kb

South Paterson airborne magnetic, radiometric, and elevation images

Images from the levelled data.
Images as .ecw files — free on web. Total magnetic intensity (TMI) and digital terrain model (DTM) images are illuminated from the east (azimuth 90 degrees, elevation 45 degrees). Ternary radiometric image is potassium, thorium, and uranium displayed as red, green, and blue. The data have been compressed 10:1 using enhanced compressed wavelet technology.


MAG image as ECW file	View or download file ZIP, 0.98 Mb
KTU image as ECW file	View or download file ZIP, 1.41 Mb
DEM image as ECW file	View or download file ZIP, 2.2 Mb

Webb Regional Gravity Survey — final gravity data

Final point-located data, grids and images from the recently completed Webb regional gravity survey are now available. Images as ECW files are provided below. Digital data can be purchased from Geoscience Australia or downloaded from GA's Geophysical Archive Data Delivery System (GADDS). The data have been compressed 10:1 using enhanced compressed wavelet technology.


Gravity image in ERS/ECW format — a pseudo-color draped image of Bouguer gravity (density 2.67). The image illustrates the range of values, from low to high as blue through to red. A sun filter has been applied to enhance features, azimuth 65 degrees.	View or download file ZIP, 77 Kb
Vertical derivative image in ERS/ECW format — a gray scale image of the first vertical derivative of the Bouguer anomalies. The image illustrates the range of values, from low to high as black through to white.	View or download file ZIP, 31 Kb
Elevation image in ERS/ECW format — a pseudo-color draped image of the elevation recorded. The image illustrates the range of count values, from low to high as blue through to red. A sun filter has been applied, to enhance features.	View or download file ZIP, 86 Kb

Western Arunta magnetic, radiometric, and gravity–magnetic drape images

Images as .ecw files - free on web Final point-located data, grids and images from the Webb regional gravity survey, Webb-Wilson regional magnetic and radiometric survey, and McDonald regional magnetic and radiometric survey can be purchased from Geoscience Australia or downloaded from GA's Geophysical Archive Data Delivery System (GADDS). Images as ECW files are provided below. The images are a subset of merged grids from the Webb-Wilson and McDonald regional surveys.

Total magnetic intensity (TMI) images are reduced to pole, illuminated from the northeast (azimuth 90 degrees, elevation 45 degrees), and generated from a colour palette (white high, blue low) using a gaussian stretch. The ternary radiometric image is potassium, thorium, and uranium (KTU) displayed as red, green, and blue, respectively. The drape image is of the first vertical derivative of the magnetic merge draped over the Webb bouguer gravity image. The data have been compressed 25:1 using enhanced compressed wavelet technology.


Western Arunta - RTP MAG image in ECW format	View or download file ECW
Western Arunta - RTP-1VD MAG image in ECW format	View or download file ECW
Western Arunta - KTU image in ECW format	View or download file ECW
Western Arunta - RTP-1VD MAG-GRAVITY drape in ECW format	View or download file ECW

Magnetic anomaly grid (80m) of Western Australia, Version 1 - 2008

This merged magnetic anomaly grid is generated from Federal and State government data sets acquired with a line spacing of 500 metres or less and selected open file data sets. The "Geoscience Australia magnetic grid of Western Australia 2005" (250 m cell size) has been used as a base reference grid and is also used to complete the background areas where closer spaced data are not available.

The final grid has a cell size of approximately 80 metres (0.0008 degrees) and was generated using Intrepid software. The grid file is approxamately 2GB size and, at present, is only available on DVD or external hard drive from GSWA (for $99); it is not available by download from the Geoscience Australia GADDS facility.

Image from the levelled data as ecw file - free on web.

The image was generated from a colour palette (white high. blue low) using histogram equalisation. To emphasize the expression of high-frequency anomalies, an artificial illumination was applied from the northeast. Grid cell size is approximately 80 m. The data have been compressed 10:1 using enhanced compressed wavelet technology.

Magnetic anomaly grid (80m) of Western Australia, Version 1 - 2008


Submit online order for grid	Submit Order ($99 inc. GST)
Image from the levelled data as ecw file - free on web.	View or download file ZIP, 44MB

Page last modified: 20-Oct-2008

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