Authors / CoAuthors
Geophysical Acquisition & Processing Section
Abstract
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 GSNSW Batemans Bay Narooma magnetic grid geodetic has a cell size of 0.00049 degrees (approximately 50m). The units are in nanoTesla (or nT). The data used to produce this grid was acquired in 1998 by the NSW Government, and consisted of 7792 line-kilometres of data at 250m line spacing and 60m terrain clearance.
Product Type
dataset
eCat Id
142100
Contact for the resource
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
- theme.ANZRC Fields of Research.rdf
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- EARTH SCIENCES
- ( Data centre )
-
- NCI
- ( Discipline )
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- Earth sciences
- ( Discipline )
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- geophysics
- ( Feature type )
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- grid
- ( Place )
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- Australia
- ( Place )
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- NSW
- ( Project )
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- survey 746
- ( Theme )
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- GADDS2.0
- ( Theme )
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- TMI
- ( Theme )
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- magnetics
- ( Theme )
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- magnetism
- ( Theme )
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- palaeomagnetism
- ( Theme )
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- airborne digital data
- ( Theme )
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- geophysical survey
- ( Theme )
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- mag
- ( Theme )
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- total magnetic intensity
- ( Theme )
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- grid
- ( Theme )
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- raster
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- Published_External
Publication Date
2020-03-07T00:00:00
Creation Date
2020-03-07T00:00:00
Security Constraints
Legal Constraints
Status
completed
Purpose
Maintenance Information
notPlanned
Topic Category
geoscientificInformation
Series Information
Lineage
This GSNSW Batemans Bay Narooma magnetic grid geodetic is an airborne-derived Total Magnetic Intensity (TMI) grid for the Batemans Bay-Narooma, NSW, 1998 survey. The survey was acquired under the project No. 746 for the geological survey of NSW. The grid has a cell size of 0.00049 degrees (approximately 50m). The units are in nanoTesla (or nT). A total of 7792 line-kilometres of data at a line spacing of 250m and 60m 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).
Parent Information
Geophysical Data Collection - Airborne Geophysics
UUID - ddeb0fc4-32e3-4913-80f2-f4249b17a925,
eCat ID - 111301
Extents
[-36.3133, -35.4586, 149.8294, 150.4151]
Reference System
WGS84 (EPSG:4326)
Spatial Resolution
Service Information
Associations
Downloads and Links
File available for download in various formats from the GADDS2 portal
GSNSW Batemans Bay Narooma magnetic grid geodetic file download
GSNSW Batemans Bay Narooma magnetic grid geodetic NCSS
GSNSW Batemans Bay Narooma magnetic grid geodetic OPeNDAP
Source Information
This GSNSW Batemans Bay Narooma magnetic grid geodetic includes airborne-derived TMI data for the Batemans Bay-Narooma, NSW, 1998 survey acquired for the geological survey of NSW