14. Appendix D - Metadata

Direct Download gnaf.xml.

G-NAF Metadata Statement

Metadata for the Metadata

  • Metadata Identifier: ad96098f-d601-4eab-adae-21e3577db033
  • Time:
    • Create Date: 2022-02-02T01:56:57.785613Z
    • Revision Date: 2025-06-19T06:05:55.523015Z
  • Responsible Party:
    • Individual: Michael Dixon
    • Organisation: Geoscape Australia
    • Position: Chief Data Officer
    • Telephone: +61 2 6260 9000
    • Delivery point: Unit 6, 113 Canberra Ave Griffith ACT 2603 Australia
  • Access, Use, Security:
  • Standard: ISO 19115-3
  • Language: English

Resource Metadata

  • Title: G-NAF
  • Abstract: The Geocoded National Address File (G-NAF) is Australia's authoritative, geocoded address file. The dataset comprises official and in use address information using data sourced across the governments of Australia.
  • Purpose: To create a single national point of access to Australian address information.
  • Responsible Party:
    • Organisation: Geoscape
    • Telephone: +61 2 6260 9000
    • Delivery point: Unit 6, 113 Canberra Ave Griffith ACT 2603 Australia
  • Access, Use, Security:
    • Legal Constraints: The Commonwealth of Australia makes this dataset available under an open licence via data.gov.au. Geoscape Australia and its authorised partners also license the dataset. Users must comply with the applicable licence terms and the Geoscape Copyright Notice and Disclaimer, available at geoscape.com.au/data-copyright-disclaimer/.
    • Security Constraints: None. This dataset is not subject to any security classification.
    • Use Limitations: Refer to the product description available via docs.geoscape.com.au for data quality and related information.
    • Releasability: This dataset must not be distributed except in accordance with the terms of the licence under which it was accessed.
  • Extents
    • Metadata extent.
    • West/Min X: 96.00
    • East/Max X: 168.00
    • South/Min Y: -45.00
    • North/Max Y: -8.00
  • Reference System:
    • GDA2020 (EPSG:7844)
    • GDA94 (EPSG:4283)
  • Keywords:
    • Address
    • Physical Address
    • GNAF
    • G-NAF
    • Geocoded National Address File
    • Geocoding
    • National Address Management Framework
    • NAMF
    • Geocode
  • Distribution:

      • This dataset is available from Geoscape Australia.

    • Format/s:
      • PSV (Pipe Separated Value files)
  • Status: completed
  • Lineage:

      • Statement:

      G-NAF uses existing and recognised address sources (referred to as contributors) from the state and territory government land records and Commonwealth government organisations. A rigorous process is used that involves textual address comparison, matching and geospatial validation to provide both national consistency and national coverage. Maintenance activities are triggered through the receipt of updated address data from data contributors according to an agreed delivery schedule. At present, this schedule defines a quarterly update process. During the maintenance phase, contributed addresses are analysed and compared to existing records in G-NAF. This analysis and comparison gives rise to new records being inserted and existing records being updated or retired. The G-NAF maintenance pre-process takes the input files from reference datasets and contributor data and performs processing prior to data being processed by the G-NAF maintenance software.

    • Additional Documentation
      • Title: G-NAF
      • Alternate Title: G-NAF Data Product Description
      • Presentation Format:
      • Linkage: https://docs.geoscape.com.au/projects/gnaf_desc/en/latest/index.html
      • Name:
      • Description: Product Description of the current version of the G-NAF (Geocoded National Address File) .
      • Function:
    • Process
      • The pre-processing phase is series of processes where the contributor model is mapped to the G-NAF data model (with parsing as necessary), rules are applied that make corrections to misspellings, abbreviations, erroneous characters and any updates to suburb data or road names propagating changes through all affected parts of the data. The G-NAF maintenance software then receives data from the pre-processing phase.
        • All the contributed addresses from each jurisdiction are cleansed, compared and merged into the normalised G-NAF maintenance model. The core maintenance process consists of address scrubbing, State-Locality validation and geocoding, Street level validation and geocoding, Address geocoding and Merging (Based on address merge criteria and confidence levels).
          • Post merge processing involves a series of steps based around Primary / Secondary maintenance, Alias / Principal maintenance, Geocode maintenance, Updating of address attributes (update attributes not in core processing), Updating of address links (i.e. contributor mapping, mesh blocks, default geocode) and Verifying the G-NAF data (i.e. conformance with data model). For and Address to be included in G-NAF it must be complete entailing 1. It must include a matched locality, 2. It must include a street name, 3. It must include either a valid number_first or lot number.
        • Maintenace and Update Frequency: quarterly