Drainage Regions - Variant of SDAC 2003
Status: This standard was approved as a departmental standard on February 16, 2009.
The classification variant of SDAC is a set of customized groupings that use SDAC sub-sub-drainage areas as building blocks. In Statistics Canada, variants are created and adopted in cases where the version of the classification does not fully meet specific user needs for disseminating data or for sampling in surveys. A classification variant is based on a classification version such as SDAC 2003. In a variant, the categories of the classification version are split, aggregated or regrouped to provide additions or alternatives (e.g. context-specific additions) to the standard structure of the base version.
Note: Some ocean drainage areas straddle the Canada-United States border; the Standard Drainage Area Classification (SDAC) 2003 includes only the parts within Canada since this is used for reporting Canadian data.