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Broken Hill-Curnamona Province regolith landforms digital data

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


Dataset citation

ANZLIC unique identifier: ANZCW0703002362

Title: Broken Hill-Curnamona Province regolith landforms digital data


Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia


Description

Abstract:

Regolith landforms interpreted and compiled 1995-1996 by D.L. Gibson, J.R. Wilford (CRC LEME/AGSO) with contributions from S.M. Hill (CRC LEME/ANU). Revised 1998 by D.L. Gibson (CRC LEME/AGSO).

This dataset provides a broad overview of the regolith landforms around the Broken Hill area and in the Curnamona Province. Data were interpreted from 1:80 000 panchromatic aerial photographs and Landsat TM imagery with limited field checking.

ANZLIC search words:

  • GEOSCIENCES Geology Mapping

Spatial domain:

locality map

Geographic extent polygon: 138.936 -29.485, 143.053 -29.485, 143.053 -32.499, 138.936 -32.499, 138.936 -29.485,

Geographic bounding box:
North bounding latitude: -29.485 °
South bounding latitude: -32.499 °
East bounding longitude: 143.053 °
West bounding longitude: 138.936 °

Data currency

Beginning date: 1996-10-01

Ending date: Not Known


Dataset status

Progress: Complete

Maintenance and update frequency: Not Known


Access

Stored data format:
DIGITAL - ArcGIS-coverage ArcInfo coverage Universal Transverse Mercator (UTM) AGD66
Available format type:
DIGITAL - shp ArcView shape file ArcView Universal Transverse Mercator (UTM)
DIGITAL - ArcGIS-coverage ArcInfo coverage Universal Transverse Mercator (UTM)

Access constraints:

Licence and fee required.

Order Product

Data quality

Lineage:

Initial data compiled in 1995/96 for two 1:500 000 sheet areas - Broken Hill (NSW) and Curnamona Province (SA).For the Broken Hill sheet area the data were captured from interpreted tracings made from 1:80 000 RC9 aerial photographs, Landsat TM imagery, existing NSW Department of Mineral Resources 1:250 000 geological maps and field mapping data onto topographic bases at 1:250 000 derived from AUSLIG 1:250 000 topo sheets.This compilation sheet was then scanned on an Optronics 5040 Scanner at a resolution of 25 microns. Resultant raster file warped to fit digital graticule generated using Intergraph CAM software. Affine-1 warp was used, with the four corners of the sheet forming tie points. The warped raster file was then vectorised and cleaned using Abakos Provec and Scanfix software.Intergraph Microstation vector data were plotted and visually checked prior to conversion to GIS format. No attribution was attatched to the Microstation data. Microstation vector data were translated to ESRI Arc/Info coverage format using in-house scripts and ESRIs IGDSARC utility. Attribute fields were populated and coverages were built, checked and edited. Arc/Info coverages were then exported to double precision, uncompressed Arc Export format. These were converted to ArcView shape files and also MapInfo native format. The Curnamona Province sheet area data were captured from interpreted tracings made from 1:80 000 RC9 aerial photographs, Landsat TM imagery, existing SA Department of Mines and Energy 1:250 000 geological maps and field mapping data onto topographic bases at 1:250 000 derived from SA Department of Mines and Energy 1:250 000 geological maps. The remaining processing steps were as for Broken Hill sheet area. The 1998 revision comprised of updated boundary and attribute data plus a detailed extended look up table of data extracted from AGSOs RTMAP Oracle database.

Positional accuracy:

The 1:250 000 topo base is based on AUSLIG 1:250 000 sheets and SADME 1:250 000 sheets. No analysis of the positional accuracy of features has been undertaken, however intuitively it is considered that about 95% of all features are within 250 metres of their true position. Data is based on interpretation of 1:80 000 air photos and Landsat TM imagery.

Attribute accuracy:

Classification is based on air photo, landsat TM imagery, limited field checking, and authors own data. Please refer to author's comprehensive explanatory notes in the explanatory_notes directory.

Logical Consistency:

Both the geoscientist and the GIS technician have visually checked plots at various stages of the map production process to identify abnormal features, positions, gaps in linework.

The GIS package ArcInfo was used to do topological consistency checks to detect flaws in the spatial data structure and to flag them as errors. This check ensures that all classified polygons are closed, nodes are formed at the intersection of lines and that there is only one label within each polygon.

There is a many to one relationship between the items LANDFORM, REGOLITH_TYPE, and INDURATION within individual regolith landform units (MAP_SYMB). This relationship is expressed in detail in the lookup tables REGO5.LUT (ArcInfo version) and "Detailed Regolith Landform Attributes" (Arcview version).

Completeness:

Data are complete to the specifications of the project.


Contact information

Contact organisation: Commonwealth of Australia (Geoscience Australia) (GA)
Contact position: Manager Client Services
Mail address: Cnr Jerrabomberra Ave and Hindmarsh Dr
Mail address: GPO Box 378
Locality: Canberra
State: ACT
Country: Australia
Postcode: 2601
Telephone: 02 6249 9966
Facsimile: 02 6249 9960
Electronic mail address: sales@ga.gov.au

Metadata information

Metadata date: 2013-03-08


Additional metadata

Metadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703002362.html

Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703002362.xml

.

Authors:Gibson, D.L. Wilford, J.R.
SPATIAL INFORMATION FOR THE NATION