Abstract
The dataset was derived by the Bioregional Assessment Programme from natural resource management regions and topographic data provided by Geoscience Australia. You can find a link to the parent datasets in the Lineage Field in this metadata statement. The History Field in this metadata statement describes how this dataset was derived.
Version 2 of the approved boundaries of the bioregions and subregions for defining the reporting regions for Bioregional Assessments of impacts of coal seam gas and coal mining development on water resources.
This release contains two spatial dataset vector layers:
ba_bioregion_alb_gda94_v02p1 is a topologically and geometrically correct spatial layer of the approved bioregions for the Bioregional Assessment Program. This layers' extent outlines the bioregions for the Assessment teams only.
ba_bioregion_and_subregion_alb_gda94_v02p1 is a topologically and geometrically correct spatial layer of the approved bioregions and subregions for the Bioregional Assessment Program. This layers' extent outlines the bioregions and subregions for the Assessment teams only.
The two layers are coincident with the three input layers and inherited the coordinate system of the parent layers (Geographic Coordinate System, Geocentric Datum of Australia 1994):
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Coal Basins sourced from Geoscience Australia Geological Provinces.
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Natural Resource Management (NRM) regions based upon catchments or bioregions which have been identified by the Australian Government, in association with state and territory governments.
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The continental scale Coastline from Geoscience Australia (Topo 250K).
Purpose
The dataset is designed to delineate the spatial area of the various bioregions being assessed as part of the Bioregional Assessments Program.
Dataset History
The layers are coincident with the three input layers & inherited the coordinate system of the parent layers (Geographic Coordinate System, Geocentric Datum of Australia 1994):
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Coal Basins sourced from Geoscience Australia Geological Provinces (GUID =13ad6933-ee80-4c51-a97b-bac1e8bef16d).
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Natural Resource Management (NRM) regions (GUID = 1d54e38f-4051-4f0c-a350-c7dbd8eba65b) based upon catchments or bioregions which have been identified by the Australian Government, in association with state and territory governments.
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The continental scale Coastline from Geoscience Australia (Topo 250K, GUID = 96ebf889-f726-4967-9964-714fb57d679b).
It was created using a number of ArcGIS (ESRI) geoprocesses; clip coal basins to onshore extent, intersect coal basins with NRM boundaries; merge regions to single layer.
This method (verified by a check & repair of geometry/topology) avoided the errors introduced in earlier versions.
Further, changes to the extents for the Northern Inland Catchments (NIC) bioregion, the Clarence-Moreton (CLM) bioregion, the Northern Sydney Basin (NSB) bioregion, and the Southern Sydney Basin (SSB) bioregion (consistent with the Decision Paper presented to & accepted by the BA Board 23rd August 2013) have been included in this updated version.
Clarence-Moreton (CLM) had the area north of the Lockyer Valley (refer to AWRC catchment mapping - GUID = d4561e86-2d13-4dcb-bf9e-aae75ba4850c) was excised & added to the Maranoa-Condamine-Balonne (MBC) subregion of the Northern Inland Catchments (NIC) region.
Northern Sydney Basin (NSB) bioregion, and the Southern Sydney Basin (SSB) bioregion were delineated using the NRM layer (2. above).
The boundary layer was then projected to Australian Albers 1994; EPSG 4283, the agreed projection for maps in technical products, as recorded in the 'Product standards for the bioregional assessments v17'.
Whilst these layers have origins similar to the layer used in the Office of Water Science Bioregional Assessment Priority Areas VERSION 1 map, they differ in that the Lake Eyre Basin (LEB) Assessment Area now consists of the four subregions & does not include a record for the Lake Eyre Basin extent. This avoids the confusion that the reporting areal extent is Lake Eyre Basin, rather it is a convenient named entity that has been inherited from the early identification of Coal Development Pathways based upon the Geoscience Australia Coal Basins spatial polygon dataset.
Dataset Citation
Bioregional Assessment Programme (2013) Bioregional Assessment areas v02. Bioregional Assessment Derived Dataset. Viewed 13 March 2019, http://data.bioregionalassessments.gov.au/dataset/e414b1b3-c42e-42e9-9cc4-2093054aa35f.
Dataset Ancestors
