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SIGNIFICANT URBAN AREA (SUA)
For the purposes of applying these criteria, a Labour Market is defined as:
Road distance is measured along the most direct sealed road with a centre line joining two Urban Centres. The distance is measured from the Urban Centre boundaries as defined by the UCL/SOS structure (see Chapter 3).
SA1s not in an SUA are combined to form a 'Not in any significant urban area' region for each S/T.
COMPARABILITY WITH STATISTICAL DISTRICTS
SUAs represent a new structure without precedent in the ASGC. For regional cities with a population of 25,000 or more, SUAs are broadly comparable to Statistical Districts (S Dists). It is important to recognise that there are a number of key differences between the SUAs and the S Dists.
The key criteria for SUA names are that they be:
Where an SUA represents a single dominant centre then it is named for that centre:
Where an SUA represents a combination of two centres of comparable importance, it is
named for both centres separated by spaces and a hyphen:
Where an SUA crosses a S/T border, it is named after the largest centre on each side, separated by spaces and a hyphen:
Where an SUA represents a region with a widely recognised name, it is named for that region:
SUA CODING STRUCTURE
An SUA is identifiable by a unique 4 digit non-hierarchical code. The SUA code is unique within Australia. The regions representing those parts of a S/T 'Not in a significant urban area' have codes ending in 000: