NSW Geoscience Metadata
NSW Isostatic residual gravity (iso-grav)
Pseudocolour image of isostatic residual gravity with a histogram-equalised colour-stretch. Cooler colours indicate lower gravity values and warmer colours represent higher values. The image has been enhanced with a 3×3 sun filter with the sun illumination set at 45 degrees elevation and 90 degrees azimuth. Bouguer gravity compensates for variations in latitude, 'free-air' elevation and Bouguer correction (assuming a crustal density of 2.67 T/m³). The isostatic correction removes the effect of the thickness of Earth’s crust due to changes in topography.
Attention: Please ensure your version of the NSW gravity merges contains the date ‘2024-10-30’ in their filename. An update was made to remedy location errors in the initial release. Apologies for any inconvenience.
Simple
Identification info
- Date (Revision)
- 2025-05-09
- Status
- Completed
- Topic category
-
- Geoscientific information
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- Keywords (Theme)
-
- Geophysics
- Gravity
- Isostatic Bouger
Distribution Information
- Distribution format
-
- OnLine resource
- Download ERS file ( Air only)
- OnLine resource
- Download TIF file (Air only)
Resource lineage
- Statement
- This edition of the NSW statewide gravity merge is a compilation of best available airborne and ground data, comprising roughly 80% airborne and 20% ground. AIR1027 and AIR1030 comprise the airborne data, with the ground data clipped from Geoscience Australia’s ANGD dataset. These data were gridded with a cell size of 500x500 metres before being corrected for isostasy following the method outlined in Spence and Musgrave (2006). The units for the data are μms⁻². This product represents the 2024 update to the NSW statewide gravity merge. This version incorporates the recently acquired statewide airborne dataset. It will represent a platform for future iterative updates. MATTHEWS S.J. 2024. New South Wales Statewide gravity merge, version 2.0 [Digital Dataset]. Geological Survey of New South Wales, Department of Primary Industries and Regional Development NSW, Maitland MATTHEWS S.J. 2020. New South Wales Statewide gravity 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:4326
Reference System Information
- Reference system identifier
- CRS:84
Metadata
- Metadata identifier
- urn:uuid/6421575e-0336-4402-84f3-d32c61275718
- Language
- English
- Character encoding
- UTF8
Type of resource
- Resource scope
- Dataset
- Metadata linkage
- https://geonetwork.geoscience.nsw.gov.au/geonetwork/srv/api/records/6421575e-0336-4402-84f3-d32c61275718
- Date info (Revision)
- 2025-05-09T09:48:17
- Date info (Creation)
- 2020-09-11T15:02:05
Metadata standard
- Title
- ISO 19115:2003/19139
- Edition
- 1.0
Overviews
Spatial extent
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