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Yeelirrie WA 1:100 000 geological mapNote: 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: ANZCW0703002445 Title: Yeelirrie WA 1:100 000 geological map CustodianCustodian: Geoscience Australia Jurisdiction: Australia DescriptionAbstract: Mapping of outcrop geology on Yeelirrie 2943 1:100 000 map sheet in the Eastern Goldfields, Western Australia, undertaken 1995 by D.Champion and A.J.Stewart as part of the National Geoscience Mapping Accord (NGMA). Briefly mapping consists of geological boundaries/units, faults, folds, veins, dykes, joints, linears, marker beds, trends, structural measurements, drill holes and mineral deposits. ANZLIC search words:
Spatial domain:
Geographic extent polygon: 120 -27, 120.5 -27, 120.5 -27.5, 120 -27.5, 120 -27,
Data currencyBeginning date: Not Known Ending date: Not Known Dataset statusProgress: In Progress Maintenance and update frequency: Not Known Access
Access constraints: Licence required. Free Data DownloadData qualityLineage: Geological and geophysical themes were generated from field observations and interpretation using aerial photographs (1:50 0000 b/w), satellite imagery (Landsat TM) and magnetic data (90m cell size grids derived from airborne magnetic surveys). Geological mapping and other geological information obtained from industry, and state/Australian Government bodies are incorporated. Mineral deposit locations and information is largely sourced from the MINLOC database maintained by BRS. Topographic themes have been provided by AUSLIG and DOLA with agreement that public release of any topographic data by AGSO will be in non digital form only. Some amendments to the topographic data have been made by the authors. Lineage of topographic data, prior to receipt from AUSLIG and DOLA, is uncertain. Maps were compiled from unrectified photo overlays onto topographic bases supplied by AUSLIG and DOLA (see notes on topographic data above). Drainage and, where necessary, other topographic features (eg fence lines) were used for spatial control of the geological data. Compilations were digitally captured either by hand or automatically by scanning and vectorising procedures. Point data with database origins have been located largely by non-differential GPS. Some detail may have been generalised, repositioned, or omitted from the primary data for cartographic purposes. Positional accuracy: The most prominent horizontal positional inaccuracy in this dataset has been introduced during compilation to topographic base maps, and is estimated at up to 300m. The main source of error is inaccuracies in the location of topographic features on the base maps, which is compounded by insufficient topographic features in some areas of the base maps with which to accurately align the photo overlays. Positional errors generated by distortions in the aerial photos and errors during the data capture process are difficult to quantify and are believed to be negligible in comparison to the topo base error. GPS located features, such as structural measurements, have an error of up to 100m due to selective availability imposed on GPS readings. The MINLOC data has been found to have errors of up to several kilometres, and efforts have been made by AGSO geologists during map production to correct the errors using GPS, and/or aerial photos and topographic base maps as a spatial control. Attribute accuracy: The bulk of attributes in this data set are qualitative and quantitative geological observations and measurements. Classifications of lithology and linear geological features are largely interpretative, based on conventional mapping techniques (field observations, photo/imagery interpretation, sample collection and analysis), and adhere to well established and standardised classification schemes. Structural measurements are quantitative, measured using standard field mapping instruments. Logical Consistency: Rigorous quality control has ensured consistency in data structures and standards across the dataset. Revisional mapping on many of the earlier mapped sheets has been carried out to achieve consistency in geological classifications across the dataset. Completeness: The level of work undertaken to map the project area varies according to the nature of the geology. Areas with large amounts of outcrop have been mapped with numerous field observations, while those tracts of land with little or no outcrop may have been mapped with few or no field observations. Reliability diagrams are included with each hardcopy release of a map sheet to display the distribution of different levels of mapping. Contact information
Metadata informationMetadata date: 2013-03-08 Additional metadataMetadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703002445.html Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703002445.xml ASCII files containing additional metadata, are stored with digital data for each sheet. Authors:Champion, D.C. Stewart, A.J. |
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SPATIAL INFORMATION FOR THE NATION
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