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Classification and coding process

Classification criteria

Address information (street number, name, and type; suburb or rural locality; and city, town or district) is the criterion used to place a dwelling into the classification.

Classification

Dwelling address is a flat classification consisting of the standard meshblock codes that are current at the commencement of the survey cycle. Dwelling address has over 40,000 categories.

The full Dwelling address classification can be downloaded from the 'Available files' section on the main page.

Coding process

Dwelling address is usually coded via information stored in the office use or administrative panel on the questionnaire. The address obtained is coded to the meshblock level. The streets file from the Geographic Frame relates street attributes to meshblocks.

Interviewer administered surveys that utilise area-based frames generally use an address file, containing all the selected addresses within selected meshblocks (or aggregations of meshblocks).

In surveys where questionnaires are mailed directly to Statistics New Zealand, or are collected from a different dwelling to where they were distributed, confirmation should be made that the address information in the questionnaire module equates with the address code (meshblock or primary sampling unit) in the office use or administrative panel. Any available information (for example, fieldbooks, maps, electoral rolls, telephone directories, and street listings) should be consulted in order to determine an appropriate meshblock.

In surveys, which do not use the Geographic Frame, for example, surveys that use a telephone frame, it may be necessary to collect dwelling address.

It is not usually necessary to impute dwelling address because it is either the basis of the frame, or the enumerator will be able to complete the address details if the respondent has not. However, because some questionnaires are mailed directly to Statistics New Zealand or are collected from a different dwelling to where they were distributed, or because the address supplied is vague or incomplete, imputation may be required. It is necessary to code every dwelling to the lowest level intended for any output.

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