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“Shaping Australia” The Development of a New Statistical Geography Standard (the ASGS)

“Shaping Australia” The Development of a New Statistical Geography Standard (the ASGS). Alister Nairn Director, Geography alister.nairn@abs.gov.au Ph : 02 6252 7759. Overview. Who cares? Media / political / user interest in geographic classifications Conceptual reasons for change.

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“Shaping Australia” The Development of a New Statistical Geography Standard (the ASGS)

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  1. “Shaping Australia”The Development of a New Statistical Geography Standard (the ASGS) Alister Nairn Director, Geography alister.nairn@abs.gov.au Ph: 02 6252 7759

  2. Overview • Who cares? Media / political / user interest in geographic classifications • Conceptual reasons for change. • Overview of the new standard and differences with ASGC.

  3. Who Cares?

  4. Political and User Interest

  5. Conceptual Reasons for Change? • Functional geography rather than administratively based • More stable units over time • Units size optimised for output • Higher spatial resolution - MBs • Better support for “Non ABS geographies”

  6. Functional area - Cooma

  7. The ASGC structure - Unstable Australia State Territory Urban Center/ Locality Major Statistical Region Section of State Statistical Division Statistical Districts Remoteness Statistical Region Statistical Subdivisions Local Government Areas Statistical Region Sector Statistical Local Areas Census Collection Districts

  8. LGAs – Unstable over Time Historical change in local governments across Australia

  9. Units optimised for release and analysis of statistics How do we determine the optimal size for statistical areas? • What data is being released? • Confidentiality issues • Accuracy issues (surveys – modelled data) • Difficulty when the classification had to fit into widely different sized LGAs

  10. Higher spatial resolution

  11. Better Support for other Non-ABS Geographies

  12. Overview of ASGSStructure

  13. SA1 • Built up from whole Mesh Blocks • Smallest Census output unit • More homogeneous in character, but replaces CD

  14. Based on functional areas and suburbs Intercensal output unit Replaces SLA as sub-LGA geography SA2

  15. Sydney SLAs

  16. Sydney SA2s

  17. Other geographic levels • SA3s • medium sized regions • Ranging from 30,000 – 130,000 • SA4s • Used as Labour Force Regions • Ranging from 100,000 to 500,000 • Greater Capital City Statistical Areas • Defined using whole SA4s • Similar to Capital City SDs • Designed to provide consistent boundaries • Incorporating any likely growth over the next 20 years

  18. SA3 and SA4

  19. Perth Greater Capital City vs Capital City SD

  20. Adelaide Greater Capital City vs Capital City SD

  21. BrisbaneGreater Capital City vs Capital City SD

  22. MelbourneGreater Capital City vs Capital City SD

  23. Availability of Statistics

  24. Availability of statistics for different levels of geography

  25. Conclusions • ASGS is here! • Published in Volumes • Main Structure MBs Dec 2010 • Non ABS Structures & Indigenous July 2011 • UCL and SUAs October 2012 • Remoteness Late 2012 • Annual update of correspondences to non- ABS structures • Effective from July 2011 • Last ASGC is July 2012. • Implementation plans by SMAs being developed.

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