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METADATA FOR DIGITAL BOUNDARY FILES - ASGS NON ABS STRUCTURES
File names have the format <file type>_<2012>_<AUST> where:
TR = Tourism Region
<AUST> indicates the data relates to Australia.
Were applicable States and Territories are identified by unique one digit codes, as listed below:
All tables show file type, file name, spatial unit field and the data type.
File Type: Local Government Area (LGA)
File Name (s): LGA_2012_AUST
File Type: Tourism Region (TR)
File Name (s): TR_2012_AUST
Date of Effect: 1 July 2012
Progress: Completed dataset
Maintenance and Update Frequency: As the Non-ABS Structures represent regions that are subject to ongoing change, the ABS will release a revised publication for ASGS Non-ABS Structures in July each year. The individual structures will only be updated where significant change has occurred in the past year.
Stored Data Format:
The digital boundary files are in MapInfo Interchange Format (.MID .MIF) and ESRI Shapefile (.shp) format.
MapInfo Interchange Format can be imported directly into MapInfo and other common Geographic Information Systems (GIS) or desktop mapping packages. The .MID .MIF files are text format and can be edited and manipulated for import to less common GIS and CAD systems.
The .MID .MIF files cannot be used directly with viewing tools such as MapInfo ProViewer.
Copyright Commonwealth of Australia administered by the ABS.
Geocentric Datum of Australia 1994 (GDA94)
The digital boundary files have the datum specified as 116 (GDA94). Users of MapInfo 6.0 or later are able to load data sets based on GDA94 directly, without transformation. Earlier versions of MapInfo cannot interpret GDA94 correctly and there may be alignment problems between data sets based on this datum and other earlier datums.
Geographical (i.e. Latitudes and Longitudes)
Mesh Blocks (MB) are the building blocks of the ASGS regions. MB boundaries were created using various sources including the PSMA digital topographic datasets, ABS 2011 SLA boundaries and zoning information from state planning agencies and imagery.
Positional accuracy is an assessment of the closeness of the location of the spatial objects in relation to their true positions on the earth's surface.
The positional accuracy includes:
Positional accuracy for ABS boundaries is dependent on the accuracy of the features they have been aligned to. ABS boundaries are aligned to a number of layers supplied by PSMA with an accuracy of +/-50 mm.
PSMA layers and their positional accuracy are as follows:
All codes and labels for all structures within the ASGS 2012 Non-ABS Structures are fully validated.
Spatial units are closed polygons. Attribute records without spatial objects have been included in the data for administrative purposes.
All structures within the 2012 ASGS Non-ABS Structures are represented.
Unincorporated LGAs are represented as non spatial records in the digital boundaries.
Contact Organisation: Australian Bureau of Statistics
Contact: ABS Geography
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