Abstract

These data represent the January 2002 edition of the Magnetic Anomaly Grid of the Australian Region. This version is the first integrated onshore/offshore magnetic anomaly grid for the complete Australian margin extending across 8S - 52S, 106E - 172E. The grid cell size is 0.01 degree (approx. 1 km). Earlier releases were restricted to portions of NW and SW Australia. - Magnetic anomaly unit is nanoTesla (nT). Appropriate IGRFs have been removed. Horizontal datum is GDA94 (which is equivalent to WGS84). - The marine data were levelled independently of the onshore data in three sectors (see below). The NNW and SSW sectors were released as grids previously. The eastern sector was levelled in 2000 in collaboration with Intrepid Geophysics (Melbourne, Australia). The three levelled sectors, together with the unlevelled sectors were combined with the onshore grid to give the present grid. Altogether, 3,022,656 data points are in the database from which the marine grid was created. - Unlevelled sectors: (-8 -25 160 172), (-39 -52 156 172), (-46 -52 106 140) - Levelled sectors: (-37 -52 140 156), (-25 -39 143 172), (-8 -25 143 160), (-24 -46 106 140), (-8 -24 106 143) - There are several places at the join between onshore and offshore grids where the two grids do not match. The problem exists because the onshore grid was developed earlier, and there was poor control on the grid merging process at the margins. Future work will attempt to address this issue and improve the continuity between the onshore and offshore grids.
Google map showing geographic bounding box with values North bound -8.0 East bound 172.0 West bound 106.0 South bound -52.0
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Product Type/Sub Type

dataset - Data Package - Geothematic

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2002

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

Data Package
Geothematic
National dataset
magnetics
geophysics
TMI
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-8.0
East bound
172.0
West bound
106.0
South bound
-52.0

Lineage

The magnetic anomaly grid is a combination of the Magnetic Anomaly Map of Australia (3rd edition, derived from aeromagnetic data) and levelled ship-track data. The onshore grid has been released separately and is available digitally in a higher resolution format with a cell size of 15 seconds of arc (approx. 400 m)(see <a href="http://www.agso.gov.au:88/int-bin/htsqr2?file=im/databases/geomet2.htsqranddataset_no=4381">GEOMET record 4381</a>), and also in 1:5,000,000 and 1:25,000,000 scale hardcopy form as enhanced images. Geoscience Australia gratefully acknowledges the contribution of aeromagnetic data and assistance by the following organisations:Northern Territory Geological Survey; Department of Primary Industries and Resources South Australia; Department of Infrastructure, Energy and Resources Tasmania; New South Wales Department of Mineral Resources; Department of Natural Resources and Environment Victoria; Geological Survey of Queensland; Geological Survey of Western Australia The offshore portion of the grid is derived from data in Geoscience Australia database GA-Mardat which has over 900 surveys acquired since 1963 by GA and foreign institutions.GA gratefully acknowledges the contribution of marine data and assistance by the following organisations: Bundesanstalt fur Geowissenschaften und Rohstoffe; Dept. Science, Industry and Resources (NZ); Geoscience Australia; Institut Francais de Recherche pour l'Exploitation de la Mer; Institut Francais pour la Recherche et la Technologie Polaires; Lamont Doherty Geophysical Observatory; Mobil Corporation; Division of National Mapping (Australia); National Geophysical Data Centre (USA); National Oceanic and Atmospheric Administration; Institut de Recherche pour le Developpement; Scripps Institution of Oceanography, U California; School of Ocean and Earth Science and Technology; South Pacific Applied Geoscience Commission; Texas A and M University; Institute of Oceanographic Sciences, UK; United States Geological Survey; US Navy; Woods Hole Oceanographic Institute

Digital Transfer Options

onLine+cdRom

Distribution Information

Price AUD$ INCL GST
99.00

DISTRIBUTION Format

unknown
ArcGIS-coverage
ers
ascii

Ordering Instructions

http://www.ga.gov.au/products-services/how-to-order-products/sales-centre.html

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

a05f7892-b67e-7506-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2002-01-22

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
This product is available for purchase for $99.00.

To purchase it, complete the order form
[PDF 45 kB] and submit it to the
Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays