Metamorphic Rocks (National Geoscience Dataset)

Note : This dataset description is metadata (data about data) which describes the actual dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2.

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Dataset citation

ANZLIC unique identifier: ANZCW0703002401
Title: Metamorphic Rocks (National Geoscience Dataset)

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Custodian

Custodian: Geoscience Australia
Jurisdiction: Australia

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Description

Abstract: This map, first published by BMR in 1983, displays the distribution of metamorphic facies in Australia. The original map was compiled between 1972 and 1983 by T.G. Vallance, G.W. DAddario, A.J. Stewart, J.E. Mitchell, J.F. Stirzaker, and A.S.Mikolajczak using data supplied by BMR, State and Territory Geological Surveys,Universities and the Geological Society of Australia. As a digital data set the attributes have been revised to allow relational analysis of the data within. Included is a GIF image file of the metamorphic grades legend for the dataset.

ANZLIC search words and qualifiers:

- GEOSCIENCES

- GEOSCIENCES Geology

Geographic extent name: AUSTRALIA EXCLUDING EXTERNAL TERRITORIES - AUS - Australia

Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register

Geographic bounding box:

North bounding latitude: -11

South bounding latitude: -44

East bounding longitude: 154

West bounding longitude: 113

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Data currency

Beginning date: Not known
Ending date: 1998-09-01

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Dataset status

Progress: Complete
Maintenance and update frequency: not planned

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Access

Stored data format:

DIGITAL: ArcGIS-coverage ArcInfo coverage Geographic WGS84

Available data format:

DIGITAL: dat Data file MapInfo Geographic WGS84

DIGITAL: shp ArcView shape file ArcView Geographic WGS84

DIGITAL: ArcGIS-coverage ArcInfo coverage Geographic WGS84

Access constraints: Free to download

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Data quality

Lineage:
This map was produced by scanning and vectorising the published 1 : 5 000 000 Metamorhic Map of Australia (Bureau of Mineral Resources, Geology and Geophysics, Australia, 1983). This original digital version (1995) contained several coverages: geological boundaries and coastline, major faults and trends. In 1996, these individual coverages were re-projected to comply with the current national dataset projections and were combined into one dataset in which the linework and the polygons were fully attributed as per the original 1983 edition. The attributes of the dataset encompass all the map surrounds but have been subsequently revised and tailored to facilitate better use in the GIS environment. As such the major attribute of the dataset is the "rock_class" which can be used to distinguish metamorphic and igneous rocks. For metamorphic rocks the items fac_series and metagrade apply and for igneous the ig_class, era and lith_desc apply.

Positional accuracy:
Nominal Scale 1:5,000,000 Variable due to the variety of sources of the data.

Attribute accuracy:
Variable due to the various sources of the original information.

Logical consistency:
A geoscientist visually inspected the finished dataset to make sure the attributes were accurate and the data were consistent spatially with current scientific information. Tests are also carried out on these data for data completeness, correct spatial representation, attribute accuracy, logical consistency and correctness, and where appropriate for compliance with Geoscience Australia's GIS data dictionary available at http://www.ga.gov.au/standards/datadict.html.

Completeness:
The dataset coverage is complete for the whole of continental Australia.

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Contact information

Contact organisation: Commonwealth of Australia (Geoscience Australia)
Acronym: GA
Position: Manager Client Services
Address: Cnr Jerrabomberra Ave and Hindmarsh Dr
Address: GPO Box 378
Suburn: Canberra
State: ACT
Country: Australia
Postcode: 2601
Phone: 02 6249 9966
Fax: 02 6249 9960
Email: sales@ga.gov.au

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Metadata information

Metadata date: 1998-11-13 00:00:00.0

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Additional metadata

There is also a GIF image of the metamorphic facies and pressure series legend that appeared on the original map which has been revised in line with the dataset. Additional Arcview legends are included with this dataset :- metpldd.avl metamorphic rocks legend, item map_legend metplddtr.avl metamorphic rocks legend translucent metlndd.avl metamorphic rocks line work, item desc polygon items :- feature MR_UNIT, MR_VOID depending on wether poly is a void or an attributed unit ufi from data standards unique identifier for each poly rock_class I or M depending on wether the rocks are igneous or metamorphic based on qualifier in the NGMA lithologies authority table. metagrade the actual grade amphibolite etc. fac_series facies series, low pressure, intermediate, not determined or combinations ig_class migmatite, ultramafic, mafic or granite etc era age (for igneous rocks only) lith_desc lithological description (for igneous rocks only) map_legend brings together all attributes in a single text line line items:- feature MR_UNIT, MR_VOID depending on wether line is a the frame or a boundary ufi from data standards unique identifier for each line agso_code agso's unique code number for linework symbol symbol number from agso's line code set desc accompanying description of agso_code number

Authors:
Wyborn, L.A.I. , Kilgour, B. , Ratajkoski, M.

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This report was generated on 20 Jun 2013.