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METADATA FOR DIGITAL BOUNDARY FILES
Within the files, the states and territories (S/T) are identified by unique one digit codes, as in the table below.
All tables show file type, file name, spatial unit field and the data type.
Progress - Completed dataset
Maintenance and Update Frequency
No further update for these boundaries are planned. The DZNs will be revised for the 2016 Census of Population and Housing.
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 in 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. More information available on the ABS website: http://www.abs.gov.au/Copyright
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.
Projection - Geographical (i.e. Latitudes and Longitudes)
Geographic Extent - Geographic Australia
Mesh Blocks are the building blocks of the ASGS regions. Mesh Blocks boundaries were created using various sources including the PSMA digital topographic datasets and ABS Statistical Local Area (SLA) boundaries, zoning information from state or territory 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:
PSMA layers and their positional accuracy are as follows:
All codes and labels for the DZN 2011 are fully validated.
Spatial units are closed polygons. Attribute records without spatial objects have been included in the data for administrative purposes.
All geographic levels of the DZN 2011 are represented.
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