NSW Geoscience Metadata
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
- 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
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
Spatial extent
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