GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic  


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 magnetic grid has a cell size of 0.00077 degrees (approximately 80m).The data are in nanoTesla (or nT). The data used to produce this grid was acquired in 2001 by the NSW Government, and consisted of 28696 line-kilometres of data at 400m line spacing and 80m terrain clearance. The data has had a variable reduction to the pole applied to centre the magnetic anomaly over the magnetised body. The VRTP processing followed a differential reduction to pole calculation up to 5th order polynomial. Magnetic inclination and declination were derived from the IGRF-11 geomagnetic reference model using a data representative date and elevation representative of the survey.

Product Type

dataset

eCat Id

142406

Contact for the resource

  Point of contact

Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia

Keywords

theme.ANZRC Fields of Research.rdf
  • EARTH SCIENCES
( Data centre )
  • NCI
( Discipline )
  • Earth sciences
( Discipline )
  • geophysics
( Feature type )
  • grid
( Place )
  • Australia
( Place )
  • NSW
( Project )
  • survey 1037
( Theme )
  • GADDS2.0
( Theme )
  • TMI
( Theme )
  • RTP
( Theme )
  • magnetics
( Theme )
  • magnetism
( Theme )
  • palaeomagnetism
( Theme )
  • airborne digital data
( Theme )
  • geophysical survey
( Theme )
  • mag
( Theme )
  • total magnetic intensity
( Theme )
  • reduced to the pole
( Theme )
  • grid
( Theme )
  • raster
  • Published_External

Publication Date

2020-03-07T00:00:00

Creation Date

2020-03-07T00:00:00

Security Constraints

Australian Government Security ClassificationSystem    

Classification - unclassified

Legal Constraints

Creative Commons Attribution 4.0 International Licence    

Access - license

Use - license

Status

completed

Purpose

Maintenance Information

notPlanned

Topic Category

geoscientificInformation

Series Information

Lineage

This GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic is an airborne-derived Total Magnetic Intensity (TMI) Reduced to the Pole (RTP) grid for the NSW DMR, Discovery 2000, Area V, Northern Moree, NSW. The survey was acquired under the project No. 1037 for the geological survey of NSW. The grid has a cell size of 0.00077 degrees (approximately 80m). The data are in nanoTesla (or nT). A total of 28696 line-kilometres of data at a line spacing of 400m and 80m terrain clearance were acquired to produce this grid. The data has had a variable reduction to the pole applied to centre the magnetic anomaly over the magnetised body. The VRTP processing followed a differential reduction to pole calculation up to 5th order polynomial. Magnetic inclination and declination were derived from the IGRF-11 geomagnetic reference model using a data representative date and elevation representative of the survey. 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

[-29.4602, -28.5165, 148.9256, 150.8466]

Reference System

WGS84 (EPSG:4326)

Spatial Resolution

Service Information

Associations

Association Type - operatedOnBy

GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic NCSS    

Association Type - operatedOnBy

GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic OPeNDAP    

Association Type - operatedOnBy

GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic WMS    

Association Type - operatedOnBy

GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic WCS    

Downloads and Links

File available for download in various formats from the GADDS2 portal  

GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic file download  

GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic NCSS  

GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic OPeNDAP  

GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic WMS  

GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic WCS  

Source Information

This GSNSW Exploration NSW Area V Northern Moree magnetic rtp grid geodetic includes airborne-derived TMI RTP data for the NSW DMR, Discovery 2000, Area V, Northern Moree, NSW acquired for the geological survey of NSW