Collection district
The CD is the smallest geographical area used in the collection and dissemination of census data. Each represented by a two digit numeric code allocated sequentially, from 01, within each census subdivision.
Where CDs for 1986 are comparable with those for 1981, and are in the same census division and census subdivision, the CD code has been retained where possible. However, for situations where CDs are not comparable between 1981 and 1986 (for example in cases where census subdivisions have been renumbered), the CD code has been allocated in a similar manner to census subdivisions.