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Data quality and confidentiality standards and guidelines (public): Appendix B

Appendix B Table of data quality flags for historical census years

2001 Census

The following table describes the data quality indicator fields and their contents as they apply to the 2001 Census. Note that a zero in any of the five bytes is the default for the respective indicator and means that no data quality action is required.

Data quality flags - 2001 Census
Byte Byte description Byte value Value description
1 Incomplete enumeration 0 <default> - Fully enumerated area.
1 Incompletely enumerated Indian reserve or Indian settlement (suppressed).
2 Excludes census data for one or more incompletely enumerated Indian reserves or Indian settlements.
2 2A data quality 0 <default>
1 Data quality indexes showing a global 2A non-response rate higher than or equal to 5% and lower than 10%.
2 Data quality indexes showing a global 2A non-response rate higher than or equal to 10% and lower than 25%.
3 Data quality index showing a global 2A non-response rate higher than or equal to 25% (suppressed).
3 Population and dwelling counts error flag 0 <default>
1 An error exists in the 2001 population and dwelling counts for this area.
4 2B data quality 0 <default>
1 Data quality indexes showing a global 2B non-response rate higher than or equal to 5% and lower than 10%.
2 Data quality indexes showing global 2B non-response rate higher than or equal to 10% and lower than 25%.
3 Data quality indexes showing a global 2B or 2A non-response rate higher than or equal to 25% (suppressed).
5 1996 adjusted population flag 0 <default>
1 1996 adjusted count; most of these are the result of boundary changes.

Prior to 2001 Census

The following table describes the data quality indicator fields and their contents as they apply to census years prior to 2001. Note that a zero in any of the five bytes is the default for the respective indicator and means that no data quality action is required.

Data quality flags - prior to 2001 Census
Byte Byte description Byte value Value description
1 Incomplete enumeration 0 <default> - Fully enumerated area.
1 Incompletely enumerated Indian reserve or settlement (suppressed).
2 Excludes census data for one or more incompletely enumerated Indian reserves or Indian settlements.
2 2A data quality 0 <default>
1 Data quality indexes showing a global non-response rate higher than or equal to 5% and lower than 25%.
2 Data quality indexes showing a global non-response rate higher than or equal to 25% (suppressed).
3 Boundary error 0 <default>
1 Areas where boundaries were found to be in error subsequent to collection.
4 2B data quality 0 <default>
1 Data quality indexes showing a global non-response rate higher than or equal to 5% and lower than 25%.
2 Data quality indexes showing global non-response rate higher than or equal to 25% (suppressed).
3 Employee resident error rate is higher than or equal to 5% and lower than 25% and global non-response rate is less than 5%.
4 Both the employee resident error rate and global non-response rate are higher than or equal to 5% and lower than 25%.
5 Employee resident error rate is greater than or equal to 25% and global non-response rate is less than 25% (suppressed).
5 1996 adjusted land area 0 No <default>
1 Yes

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