Authors / CoAuthors
Kilgour, B.
Abstract
These images are derived from the "Gravity Anomaly Grid of the Australian Region" (GEOCAT record: 38953). That grid combines accurate onshore gravity measurements, a sub-sample of the levelled offshore marine gravity traverses with satellite data used in areas where there is no marine data. The cell values represent simple Bouguer anomalies at a density of 2.67 tm−³ onshore and free-air anomalies offshore. The grid cell size is 0.5 minutes of arc, which is equivalent to about 800 metres. The smallest wavelength contained in the grid is 1600 m.
Product Type
dataset
eCat Id
39158
Contact for the resource
Custodian
Owner
Point of contact
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
Canberra
ACT
2601
Australia
Keywords
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- GIS DatasetNational
- ( Theme )
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- geophysics
- ( Theme )
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- gravity
- Australian and New Zealand Standard Research Classification (ANZSRC)
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- Earth Sciences
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- Retired_Internal
Publication Date
2002-01-01T00:00:00
Creation Date
Security Constraints
Legal Constraints
Status
Purpose
Maintenance Information
continual
Topic Category
geoscientificInformation
Series Information
Lineage
Using an ER Mapper algorithm associated with the "Gravity Anomaly Grid of the Australian Region" (GEOMET record : 4341) a colour geo-referenced TIF was generated using the pseudocolour palette and manipulated so as to appear to be illuminated from the northwest. This TIF image was then compressed 3 times to an adequate size for provision over the Internet utilising ER Mappers ECW compression. The gravity grid was then reprojected to Lambert Conformal Conic projection, with a cellsize of 800 metres. A geo-referenced TIF image and an ECW 6 times compressed image were then generated in the same process outlined above.
Parent Information
Extents
[-48.0, -7.0, 105.0, 162.0]
Reference System
Spatial Resolution
Service Information
Associations
Downloads and Links
Source Information
Source data not available.