Address information is essential for matching people between PES and Census data. Matching a person between the data sources is facilitated by the location of the dwelling where they were enumerated in PES, where they were included on a Census form and where they may have been included on a Census form. PES has two purposes that require the processing of address information:
- "Geocoding" is the process whereby an address is located and assigned to geographic information such as a Coordinate (e.g. Latitude & Longitude), a Mesh Block (MB) or a Statistical Area Level 1 (SA1) boundary. Geocoding is required for automated datalinking of persons. PES requires the MB and SA1 location to search for person matches during automated data linking for all PES enumeration addresses (where the PES interview took place) and all 'search addresses' (other locations that respondents may have been present on Census night, or recorded on a form on Census night). Geocoding is relatively robust to errors (eg character substitution or form scanning errors) in the address text as it needs only to identify the locality and not a specific address or dwelling; and
- "Address text parsing & matching" is the process whereby an address is matched to a specific entry on an existing address index such as the Address Register. PES benefits from identifying an exact dwelling match where possible, in order to identify a specific Census form to examine during clerical review. Address text matching is more precise than geocoding, seeking an exact address match rather than the locality, but is more susceptible to errors or missing entries in the address list.