• NSW Geoscience Metadata
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NSW Second Vertical Derivative of TMI RTP (2VD TMI RTP)

Greyscale image of second vertical derivative (2VD) of total magnetic intensity reduced to the pole (TMI RTP). Darker tones indicate lower values and lighter tones represent higher values. Reduction to the pole filters magnetic anomalies to appear as if the Earth's magnetic field were locally vertical, as at the magnetic pole (assuming all magnetic sources are inductively magnetised). The 2VD filter shows the vertical rate of change in the first vertical derivative (1VD) of the Earth's total magnetic field and enhances boundaries and structural detail of shallow sources further than 1VD. The 2VD filter enhances magnetic textures in the image, however, it also amplifies non-geological noise. Variations in the magnetic field are caused by lithological factors, principally magnetite (and/or pyrrhotite) content. This Statewide image was generated by merging many individual airborne magnetic surveys.

Simple

Identification info

Date (Revision)
2025-04-16
Status
Completed

Custodian

Geological Survey of NSW - Email MinView Information
Topic category
  • Geoscientific information
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Keywords (Theme)
  • Geophysics
  • Magnetics
  • 2nd Derivative
Keywords (Place)
  • New South Wales
Language
English

Distribution Information

Distribution format
  • Web Map Service

Distributor

Distributor

Geological Survey of NSW - Email Geophysics Products
OnLine resource
Download 2VD TMI RTP 2024 ERS file (4.5GB)

OnLine resource
Download 2VD TMI RTP 2024 TIF file

Resource lineage

Statement
This product represents the 2024 update to the NSW statewide magnetic merge. This version was rebuilt from the line data of all included surveys, and as of the 2020 release, incorporates high resolution open-file company data. MATTHEWS S.J. 2024. New South Wales Statewide magnetic merge, version 3.0 [Digital Dataset]. Geological Survey of New South Wales, Department of Primary Industries and Regional Development, Maitland. MATTHEWS S.J. 2022. New South Wales Statewide magnetic merge, version 2.0 [Digital Dataset]. Geological Survey of New South Wales, Department of Regional NSW, Maitland. MATTHEWS S.J. 2020. New South Wales Statewide magnetic merge, version 1.0 [Digital Dataset]. Geological Survey of New South Wales, Department of Regional NSW, Maitland.
Hierarchy level
Dataset

Reference System Information

Reference system identifier
EPSG:3857

Reference System Information

Reference system identifier
CRS:84

Metadata

Metadata identifier
urn:uuid/dcbd5b9f-2bd5-48eb-a897-27c1a8440878

Language
English
Character encoding
UTF8

Custodian

Geological Survey of NSW - Email MinView Information

Type of resource

Resource scope
Dataset
Metadata linkage
https://geonetwork.geoscience.nsw.gov.au/geonetwork/srv/api/records/dcbd5b9f-2bd5-48eb-a897-27c1a8440878

Date info (Revision)
2025-04-16T13:26:04
Date info (Creation)
2020-11-19T09:10:59

Metadata standard

Title
ISO 19115:2003/19139
Edition
1.0
 
 

Overviews

geophys-imagery-geophys-mag-tmi-rtp-2vd.png

Spatial extent

N
S
E
W


Keywords

2nd Derivative Geophysics Magnetics

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Associated resources

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