NSW Isostatic Gravity on Tilt angle filtered Total Magnetic Intensity Reduced to the Pole
Isostatic residual Bouguer gravity image overlain on tilt-filtered total magnetic intensity reduced to the pole (Tilt TMI RTP) image. The image is a partially-transparent pseudocolour layer of Isostatic residual Bouguer gravity, with a histogram-equalised colour-stretch, overlain on a greyscale intensity layer of the Tilt TMI RTP, with a histogram-equalised stretch. 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 variations in the thickness of the Earth’s crust due to changes in topography. The tilt-angle filter of total magnetic intensity produces a local positive maximum over a magnetic source and is zero near the edge of the source, and is useful for tracing geological structure below variable depths of cover.
Simple
Identification info
- Date (Revision)
- 2017-07-26T00:00:01
- Status
- Completed
- Topic category
-
- Geoscientific information
- Keywords (Theme)
-
- Geophysics
- Gravity
- Isostatic Bouger
- Tilt filter
Distribution Information
- Distribution format
-
Resource lineage
- Statement
- The spherical cap Bouguer gravity (ANGD) was downloaded from GADDS in March 2020 and clipped to NSW. These data were gridded with a cell size of 500x500 metres before being corrected for isostasy following the method outlined in Spencer and Musgrave (2006). The units for the data are μms⁻².
- Hierarchy level
- Dataset
Reference System Information
- Reference system identifier
- EPSG:4326
Reference System Information
- Reference system identifier
- CRS:84
Metadata
- Metadata identifier
- urn:uuid/500229ef8ccc7e057a48e3b98cf49d2c5069d80a
- Language
- English
- Character encoding
- UTF8
Type of resource
- Resource scope
- Dataset
- Metadata linkage
- https://geonetwork.geoscience.nsw.gov.au/geonetwork/srv/api/records/500229ef8ccc7e057a48e3b98cf49d2c5069d80a
- Date info (Revision)
- 2024-05-09T18:04:45
- Date info (Creation)
- 2020-08-03T14:43:49
Metadata standard
- Title
- ISO 19115:2003/19139
- Edition
- 1.0