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INFORMATION ABOUT DESTINATION ZONES (DZNs)
The DZNs were developed by the individual state or territory governments Transport authorities, for the analysis of commuting patterns and the development of transport policy.
The DZN regions are not an Australian Statistical Geography Standard (ASGS) structure and do not represent an Australian Bureau of Statistics (ABS) standard.
The reasons for this are:
DZNs are built from Mesh Blocks and aggregate to a subset of the ASGS regions. They cover the whole of Australia without gaps or overlaps.
DZNs are not part of the ASGS therefore the ABS will only provide limited supporting material.
CURRENCY OF THE DZNs
The DZNs are current from the date of the 2011 Census of Population and Housing: 9 August 2011.
HIERARCHY OF DZNs
The DZNs are built from whole Mesh Blocks and aggregate to Statistical Areas Level 2 (SA2s). The hierarchy has only one level between the Mesh Blocks and SA2s: the DZNs themselves.
As the DZNs aggregate to SA2s, they can be aggregated to any level of the ASGS which itself is an aggregation of SA2s.
Diagram 1 shows the relationship between the DZNs and the ASGS.
For more information regarding the Mesh Blocks, SA2s, SA3s, SA4s, GCCSA and S/T, please refer to Australian Statistical Geography Standard (ASGS): Volume 1 - Main Structure and Greater Capital City Statistical Areas, July 2011 (cat. no. 1270.0.55.001).
For more information on Tourism Regions please refer to Australian Statistical Geography Standard (ASGS): Volume 3 - Non-ABS Structures, July 2011 (cat. no. 1270.0.55.002).
For more information on Significant Urban Areas please refer to Australian Statistical Geography Standard (ASGS): Volume 4 - Significant Urban Areas, Urban Centres and Localities, Section of State, July 2011 (cat. no. 1270.0.55.004).
DZN CODING CONVENTIONS
A DZN is identifiable by a 9 digit code. This compromises the S/T, SA2 and DZN identifier code. A DZN identifier is only unique within a state or territory. DZNs do not have names.
DZN Special Purpose Codes
Two special purpose identifiers are reserved for 'Place of Work (POW) not stated' and 'POW not applicable'. These are Australia wide and no state or territory identifier is applicable, these are:
@@@@: POW not applicable
There are four special DZN identifiers in each state and territory these are:
9799: Migratory – Offshore – Shipping (S/T) (note that this includes Antarctica)
9099: POW Capital City undefined (note this is followed by the name of capital city)
9899: POW State/Territory undefined (S/T)
Please note: these codes are non-spatial and cannot be represented geographically.
Example: POW No Fixed Address (NSW) 194999499
There is a series of SA2 'Not further defined codes' included in the digital boundaries, although they cannot be represented geographically. They represent data, which can be assigned to the SA2 level, but cannot be assigned to a DZN within the SA2. These codes are included in the Census data itself. They compromise the S/T, the SA2 and the DZN identifier 9999. 'Not further defined codes' are only present for SA2s that contain data for DZN 9999.
Example: Not Further Defined 710029999
Table 1 summarises the number of regions at each level of the DZNs for each state or territory.
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