Metadata for Digital Boundary Files - ASGS Non ABS Structures

Australian Statistical Geography Standard (ASGS) Volume 3 - Non ABS Structures (cat no. 1270.0.55.003)

Date of Publication/ Date Stamp: 16 June 2020

Presentation Format: Digital boundaries

Custodian

Custodian: Australian Bureau of Statistics (ABS)

Description

Abstract:

This edition of the Australian Statistical Geography Standard (ASGS) Volume 3 - Non-ABS Structures (cat no. 1270.0.55.003), is the 2020 update of the ASGS Volume 3 that was published in 2019. It contains the names, codes and digital boundaries for regions that have changed since the 2019 release. 

The digital boundaries for this update represent the Non-ABS Structures, comprising of:

• Local Government Area (LGA)
• State Electoral Division (SED)

File Nomenclature:

File names have the format <file type>_<2020>_<AUST> where: 
< file type> represents the type of boundaries in each file
LGA = Local Government Area
SED = State Electoral Division
< 2020> represents 2020 the year of the Australian Statistical Geography Standard (ASGS) Edition
< AUST> indicates the data that covers all of Australia as defined in ASGS Volume 1.

Where applicable States and Territories are identified by unique one digit codes, as listed below:

Code	State and Territory
1	New South Wales
2	Victoria
3	Queensland
4	South Australia
5	Western Australia
6	Tasmania
7	Northern Territory
8	Australian Capital Territory
9	Other Territories

File Attributes:

All tables show file type, file name, spatial unit field and the data type.

File Type: Local Government Area (LGA)

File Name (s): LGA_2020_AUST

Count	Field (GeoPackage)	Field (ESRI shp)	Data Type	Length
1	LGA_CODE_2020	LGA_CODE20	Character	5
2	LGA_NAME_2020	LGA_NAME20	Character	50
3	STATE_CODE_2016	STE_CODE16	Character	1
4	STATE_NAME_2016	STE_NAME16	Character	50
5	AREA_ALBERS_SQKM	AREASQKM20	Float

File Type: State Electoral Division (SED)

File Name (s): SED_2020_AUST

Count	Field (GeoPackage)	Field (ESRI shp)	Data Type	Length
1	SED_CODE_2020	SED_CODE20	Character	5
2	SED_NAME_2020	SED_NAME20	Character	50
3	AREA_ALBERS_SQKM	AREASQKM20	Float

Data Currency

Date of Effect: 16 June 2020


Dataset Status

Progress: Complete

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.


Access

Stored Data Format:

The digital boundary files are in Geopackage and ESRI Shapefile (.shp) format.

Spatial Representation Type:

Vector

Access Constraints:

Copyright Commonwealth of Australia administered by the ABS. Unless otherwise noted, content is licensed under a Creative Commons Attribution 2.5 Australia licence.

Datum:

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.


Data Quality

Lineage:

Mesh Block boundaries were created using various sources including the PSMA digital datasets and ABS boundaries, zoning information from State planning agencies and imagery.

Positional Accuracy:

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:

• a horizontal accuracy assessment
• a vertical accuracy assessment

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:

• Transport and Topography
  +/- 2 metres in urban areas and +/- 10 metres in rural and remote areas
• CadLite
  +/- 2 metres in urban areas and +/- 10 metres in rural and remote areas
• Administrative Boundaries
  Derived from the cadastre data from each Australian State and Territory jurisdiction
• Greenspace and Hydrology
  Relative spatial accuracy of these themes reflects that of the jurisdictional source data. Generally the accuracy is +/- 2 metres in urban areas and +/- 10 metres in rural and remote areas.

Attribute Accuracy:

All codes and labels for all structures within the ASGS 2020 Non ABS Structures are fully validated.


Logical Consistency:

Spatial units are closed polygons. Attribute records without spatial objects have been included in the data for administrative purposes.


Contact Information

Contact Organisation: Australian Bureau of Statistics

Contact: For further information email <client.services@abs.gov.au> or contact the National Information and Referral Service (NIRS) on 1300 135 070.
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