METADATA FOR DIGITAL BOUNDARY FILES - ASGS NON ABS STRUCTURES

TITLE

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

Data Currency: 1 July 2012

Presentation Format: Digital boundaries


CUSTODIAN

Custodian: Australian Bureau of Statistics


DESCRIPTION

Abstract:

This edition of the Australian Statistical Geography Standard (ASGS) Volume 3 - Non-ABS Structures (cat no. 1270.0.55.003), is the 2012 update of the ASGS Volume 3 that was published in July 2011. It contains the names, codes and digital boundaries for regions that have changed since the 2011 release.

The digital boundaries for this update to Volume 3 of the ASGS represent the Non-ABS Structures, comprising of:

• Local Government Area (LGA)
• Tourism Region (TR).

File Nomenclature:

File names have the format <file type>_<2012>_<AUST> where:

<file type> represents the type of boundaries in each file
LGA = Local Government Area
TR = Tourism Region

<2012> represents 2012 the year of the Australian Statistical Geography Standard (ASGS) Edition

<AUST> indicates the data relates to Australia.

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

State and Territory Codes and Names
Code	S/T
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_2012_AUST

Count	Field (mid/mif)	Field (ESRI shp)	Data Type
1	LGA_CODE_2012	LGA_CODE12	Character(5)
2	LGA_NAME_2012	LGA_NAME12	Character(50)
3	STATE_CODE_2011	STE_CODE11	Character(1)
4	STATE_NAME_2011	STE_NAME11	Character(30)
5	AREA_ALBERS_SQKM	AREA_SQKM	Float

File Type: Tourism Region (TR)

File Name (s): TR_2012_AUST

Count	Field (mid/mif)	Field (ESRI shp)	Data Type
1	TR_CODE_2012	TR_CODE12	Character(5)
2	TR_NAME_2012	TR_NAME12	Character(50)
3	STATE_CODE_2011	STE_CODE11	Character(1)
4	STATE_NAME_2011	STE_NAME11	Character(30)
5	AREA_ALBERS_SQKM	AREA_SQKM	Float

DATA CURRENCY

Date of Effect: 1 July 2012


DATASET STATUS

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.


ACCESS

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.

Access Constraints:

Copyright Commonwealth of Australia administered by the ABS.

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 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:

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 meters in urban areas and +/- 10 meters in rural and remote areas
• CadLite
  +/- 2 meters in urban areas and +/- 10 meters 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 2012 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 2012 ASGS Non-ABS Structures are represented.

Unincorporated LGAs are represented as non spatial records in the digital boundaries.


CONTACT INFORMATION

Contact Organisation: Australian Bureau of Statistics

Contact: ABS Geography

Contact information:

e-mail: geography@abs.gov.au