Full description
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 GSWA Holleton North magnetic grid geodetic has a cell size of 0.001 degrees (approximately 103m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 1997 by the WA Government, and consisted of 4255 line-kilometres of data at 400m line spacing and 40m terrain clearance.
Lineage
Maintenance and Update Frequency: notPlanned
Statement: This GSWA Holleton North magnetic grid geodetic is an airborne-derived Total Magnetic Intensity (TMI) grid for the Holleton North, WA, 1997 survey. The survey was acquired under the project No. 1077 for the geological survey of WA. The grid has a cell size of 0.001 degrees (approximately 103m). The units are in nanoTesla (or nT). A total of 4255 line-kilometres of data at a line spacing of 400m and 40m terrain clearance were acquired to produce this grid. 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.
Reference:
Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).
Created: 07 03 2020
Issued: 07 03 2020
Modified: 06 07 2021
Data time period: 15 12 1997 to 20 12 1997
text: westlimit=118.7919; southlimit=-31.9282; eastlimit=119.3299; northlimit=-31.4892; projection=GDA94 (EPSG:4283)
Subjects
Australia |
EARTH SCIENCES |
Earth sciences |
GADDS2.0 |
NCI |
Published_External |
TMI |
WA |
airborne digital data |
geophysical survey |
geophysics |
geoscientificInformation |
grid |
mag |
magnetics |
magnetism |
palaeomagnetism |
raster |
survey 1077 |
total magnetic intensity |
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Other Information
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. (File available for download in various formats from the GADDS2 portal)
url :
https://portal.ga.gov.au/persona/gadds
File download for GSWA Holleton North magnetic grid geodetic (GSWA Holleton North magnetic grid geodetic file download)
NetCDF Subsetting Service (NCSS) for GSWA Holleton North magnetic grid geodetic (GSWA Holleton North magnetic grid geodetic NCSS)
OPeNDAP web service for GSWA Holleton North magnetic grid geodetic (GSWA Holleton North magnetic grid geodetic OPeNDAP)
OGC Web Mapping Service (WMS) for GSWA Holleton North magnetic grid geodetic (GSWA Holleton North magnetic grid geodetic WMS)
OGC Web Coverage Service (WCS) for GSWA Holleton North magnetic grid geodetic (GSWA Holleton North magnetic grid geodetic WCS)
GSWA Holleton North magnetic grid geodetic NCSS
GSWA Holleton North magnetic grid geodetic OPeNDAP
GSWA Holleton North magnetic grid geodetic WMS
GSWA Holleton North magnetic grid geodetic WCS
Identifiers
- URL : pid.geoscience.gov.au/dataset/ga/143284
- global : 39be4fd8-77a8-41ac-afae-ed4b91a1fc97
