• NSW Geoscience Metadata
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NSW First Vertical Derivative of TMI RTP (1VD TMI RTP) Upward Continued to 500m

Greyscale image of the first vertical derivative (1VD) of total magnetic intensity reduced to the pole (TMI RTP) which has been upward continued by 500m. 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). Upward continuation artificially increases the elevation which removes the influence of high frequency signals caused by near surface geology. The 1VD filter shows the vertical rate of change in the Earth's total magnetic field and enhances boundaries and structural detail of shallow sources. 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)
2025-04-15
Status
Completed

Custodian

Geological Survey of NSW - Email MinView Information
Topic category
  • Geoscientific information
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Keywords (Theme)
  • Geophysics
  • Magnetics
  • 1st Derivative
Keywords (Place)
  • New South Wales
Language
English

Distribution Information

Distribution format
  • Web Map Service

OnLine resource
Download 1VD TMI RTP UC 0p5km 2024 TIF file

OnLine resource
Download 1VD TMI RTP UC 0p5km 2024 ERS 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/f7784567-8168-4e78-9623-726f42ee4092

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/f7784567-8168-4e78-9623-726f42ee4092

Date info (Revision)
2025-04-16T14:02:06
Date info (Creation)
2020-11-19T09:10:04

Metadata standard

Title
ISO 19115:2003/19139
Edition
1.0
 
 

Overviews

geophys-imagery-geophys-mag-tmi-rtp-1vd.png

Spatial extent

N
S
E
W


Keywords

1st Derivative Geophysics Magnetics

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Access to the portal
Read here the full details and access to the data.

Associated resources

Not available


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