File 29DataCan refer to: (1) the demographic data used in the Data Linkage process; or (2) information pertaining to services provided to people or their clinical information (available only from Data Custodians, including via CARES). sources that incorporate address information can be assigned latitude and longitude, collector's district (CD), statistical local area (SLA), local government area (LGA) and radius values using purpose-built address parsing software linking to land-based reference datasets.

The following data collections are routinely geocoded and area codes are assigned using the 1996, 2001 and 2006 census boundaries:

  • Hospital Morbidity Data Collection (HMDC), post 1993
  • Midwives Notifications System (MNS)
  • Emergency Department Data Collection (EDDC)
  • WA Death Registrations

Collection District (CD) and SEIFA and RA values

A collection district covers about 200 households and at this level of specificity there could be potential to render other details identifiableRelated to the identifiability of a dataset/data item; where the identity of a person/organisation is immediately obvious.. Consequently, CD codes are not usually supplied on research data extracts; however SEIFA and/or RA values can be provided with HMDC, MNS, EDDC and Death records at CD and SLA level. In most cases SLA, LGA and radius are supplied on data extracts where needed.

If latitude and longitude or CD codes are required for geographic or environmental analyses written justification must be included in the relevant data variable lists.

The Australian Bureau of Statistics (ABS) provides more information on SEIFA:

More information on RA is available at: