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Bass Basin GIS project : an output of the Western Tasmanian Regional Minerals Program - geological dataNote: This metadata describes the dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2. Dataset citationANZLIC unique identifier: ANZCW0703004561 Title: Bass Basin GIS project : an output of the Western Tasmanian Regional Minerals Program - geological data CustodianCustodian: Geoscience Australia Jurisdiction: Australia DescriptionAbstract: This metadata encompasses shape files found in the "geological" directory on the CD-ROM. They are as follows:- sedimentary_basins.shp The dataset provides outlines and names of a clipped region of Australian sedimentary basins and sub-basins onshore and offshore, in the Bass Straight region (see Geographic Extent Polygon). They were compiled as part of Geoscience Australia marketing activities aimed at encouraging further exploration of Australian oil and gas reserves. techtonics.shp This dataset is a spatial representation of a database of the Tectonic Elements of the Australian region (clipped to mentioned Polygon Coordinate String), based on Geoscience Australia interpretations of existing datasets and on other published information. The database is under constant development as Geoscience Australia carries out new interpretations. basin_elements.shp These data contain interpreted basin bounding faults and basin hinges for the Bass and Durroon Basins. Fault and hinge interpretations have been based on Geoscience Australia's seismic, magnetic, and gravity datasets. Basin bounding Faults define major structures that in seismic data were interpreted to have been active during basin forming deformation. Basin Hinges define hinge lines where syn-basin tectonic structures and sedimentation make way for post-basin tectonic structures and sediment infill. Basin hinges have also been marked along areas of significant stratigraphic thinning and some volcanically dominated areas. ANZLIC search words:
Spatial domain:
Geographic extent name: BASS STRAIT - BASS STRAIT - Ocean and Sea Regions - Australia Geographic extent polygon: 143 -37, 149 -37, 149 -43, 143 -43, 143 -37, Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register
Data currencyBeginning date: 2002-02-10 Ending date: 2002-06-10 Dataset statusProgress: Complete Maintenance and update frequency: Not Known Access
Access constraints: General Geoscience Australia licience agreement and fee required Free Data DownloadData qualityLineage: sedimentary_basins.shp Basin outlines were digitised in Arcinfo from the 1:2 500 000 Geological Map of Australia in 1992. Their boundaries were updated in Petroseis in 1994 by adding some offshore basins and sub-basins from the unpublished Tectonic Elements of Australia map. The 1996 update of the sedimentary basins data set included: bringing changes made to the offshore basins in 1994 into the Arcinfo coverage, further editing the offshore basin boundaries, adding volcanic provinces of the continental margin and classifying basin boundaries into basins, sub-basins and coastline. The final shapefile was clipped to Polygon Coordinate Strings previously mentioned. techtonics.shp The original database is held in Petroseis and updated every time there is a substantial quantity of new information available. The database can be exported as a series of shapefiles which were merged to form this dataset; alternatively, it can be exported as a series of simple ASCII files which can then be reformatted for input to other software packages (ArcView shape file). basin_elements.shp These datasets are the interpretive results of a geological case study on the Bass Basin. Faults were drafted on hardcopy maps and subsequenlty scaned. Scanned images were georeferenced using Microstation (V J1.0) and then heads-up digitised in ArcInfo (V 8.0.2). Line coverages built and then were checked visually for errors. Coverages were then brought into ArcView (V 3.2) and converted to shapefiles. Positional accuracy: sedimetary_basins.shp Nominal Scale 1:5,000,000 techtonics.shp Nominal Scale 1:2,000,000 basin_elements.shp Nominal Scale 1:1,000,000 Faults were interpreted and digitised on mapsheets at 1:500,000 scale. Some human error may be involved with the heads-up digitising proccess. Attribute accuracy: The features assigned in the dataset were defined from scientific interpretations. Attributes are highly accurate as they have been verified by scientific staff on completion. sedimetary_basins.shp High techtonics.shp High basin_elements.shp High Logical Consistency: sedimentary_basins.shp, techtonics.shp 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. basin_elements.shp The digitised data has been visually verified against Geoscience Australia's interpreted reprocessed seismic lines (surveys: 40, 82, and 90), gravity data, and magnetic data. Completeness: sedimentary_basins.shp, techtonics.shp Complete for continental and offshore Australia. basin_elements.shp Complete for regional scale basin structures. Contact information
Metadata informationMetadata date: 2013-03-08 Additional metadataMetadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703004561.html Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703004561.xml This data is a component of a product which has been contracted to Geoscience Australia by Mineral Resource of Tasmania. sedimentary_basins.shp polygon items: feature feature type BASIN ufi unique numeric identifier b1 name of basin at surface b2 name of basin below b1 (basin 1) b3 name of basin below b2 (basin 2) b4 name of basin below b3 (basin 3) bas_type classification of basins into, single basin, overlap, dual overlap, high, marginal shelf, volcanic and crystalline basement bas_pros for use with depth to basement image - shows non prospective basins. techtonics.shp line items: name if specified the name of the tectonic element type the type of the tectonic element basin_elements.shp: shape feature type type basin boundary type ufi unique numeric identifier dip_direct generalized element dip direction represented by: N = north, E = east, S = south, and W = west Authors:Blevin, J.E. Trigg, K. Mitchell, C. Nicholson, C. |
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SPATIAL INFORMATION FOR THE NATION
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