This document was added or updated on 28/08/2018.

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: 31 July 2018

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 2018 update of the ASGS Volume 3 that was published in 2017. It contains the names, codes and digital boundaries for regions that have changed since the 2017 release. 

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

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

File Nomenclature:

File names have the format <file type>_<2018>_<AUST> where: 
< file type> represents the type of boundaries in each file
LGA = Local Government Area
CED = Commonwealth Electoral Division
SED = State Electoral Division
< 2018> represents 2018 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_2018_AUST

Count	Field (mid/mif, Tab and GeoPackage)	Field (ESRI shp)	Data Type	Length
1	LGA_CODE_2018	LGA_CODE18	Character	5
2	LGA_NAME_2018	LGA_NAME18	Character	50
3	STATE_CODE_2016	STE_CODE16	Character	1
4	STATE_NAME_2016	STE_NAME16	Character	50
5	AREA_ALBERS_SQKM	AREASQKM18	Float

File Type: Commonwealth Electoral Division (CED) File Name (s): CED_2018_AUST Count Field (mid/mif, Tab and GeoPackage) Field (ESRI shp) Data Type Length 1 CED_CODE_2018 CED_CODE18 Character 3 2 CED_NAME_2018 CED_NAME18 Character 50 3 AREA_ALBERS_SQKM AREASQKM18 Float

File Type: State Electoral Division (SED) File Name (s): SED_2018_AUST Count Field (mid/mif, Tab and GeoPackage) Field (ESRI shp) Data Type Length 1 SED_CODE_2018 SED_CODE18 Character 5 2 SED_NAME_2018 SED_NAME18 Character 60 3 AREA_ALBERS_SQKM AREASQKM18 Float

DATA CURRENCY

Date of Effect: 31 July 2018


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 MapInfo Tab format (.Tab), MapInfo Interchange Format (.mid .mif), 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 2018 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.

Completeness:

All structures within the 2018 ASGS Non ABS Structures are represented.