Data

Horsham, Vic, 1994 VIMP Survey (GSV3020) (P637), magnetic line data, AWAGS levelled

Geoscience Australia
Geophysical Acquisition & Processing Section
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
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Creative Commons Attribution 4.0 International Licence
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(c) Commonwealth of Australia (Geoscience Australia) and State of Victoria (Geological Survey of Victoria) 2019

Australian Government Security ClassificationSystem

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WWW:LINK-1.0-http--link

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Brief 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. These line dataset from the Horsham, Vic, 1994 VIMP Survey (GSV3020) survey were acquired in 1994 by the VIC Government, and consisted of 73755 line-kilometres of data at a line spacing between 200m and 200m, and 80m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

Lineage

Maintenance and Update Frequency: notPlanned
Statement: This Horsham, Vic, 1994 VIMP Survey (GSV3020) (P637), magnetic line data, AWAGS levelled is an airborne-derived magnetic line dataset for the Horsham, Vic, 1994 VIMP Survey (GSV3020) survey. The data was acquired under the project No. 637 for the geological survey of VIC. A total of 73755 line-kilometres of data at a line spacing between 200m and 400m, and 80m terrain clearance were acquired during this survey. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data (Milligan et al., 2009). This survey data is essentially levelled to AWAGS. 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: Milligan, P.R., Minty, B.R.S., Richardson, M. & Franklin, R., 2009. The Australia-wide Airborne Geophysical Survey accurate continental magnetic coverage. Preview, No. 138, p. 1-128, Percival, P.J., 2014. Index of airborne geophysical surveys (Fourteenth Edition).

Created: 15 12 2019

Issued: 15 12 2019

Modified: 06 07 2021

Data time period: 08 1994 to 30 09 1994

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143.4317,-34.9658 143.4317,-36.6926 140.8889,-36.6926 140.8889,-34.9658 143.4317,-34.9658

142.1603,-35.8292

text: westlimit=140.8889; southlimit=-36.6926; eastlimit=143.4317; northlimit=-34.9658; projection=GDA94 (EPSG:4283)

Subjects
AWAGS | Australia | EARTH SCIENCES | Earth sciences | GADDS2.0 | Published_External | VIC | airborne digital data | geophysical survey | geophysics | geoscientificInformation | line | magnetic | magnetics | magnetism and palaeomagnetism | survey 637 | vector |

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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)

uri : https://portal.ga.gov.au/persona/gadds

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