Appendix D

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Unique identifiers are codes that uniquely identify a geographic area within Canada. Data from different files (but for the same geographic area) can be joined or related based on the unique identifier. For example, the data in GeoSuite can be mapped on the Census Subdivision Boundary Files using the CSDUID as the field by which the two data sets can be related.

Table D.1
Unique identifiers consistent with other geography products
Geographic area
Unique identifier
Code composition
Province/Territory
PRUID 2-digit province code
Federal electoral district
FEDUID (2-digit province code) and (3-digit federal electoral district code)
Census metropolitan area/Census agglomeration
CMAUID 3-digit census metropolitan area/census agglomeration code
Where there are no census metropolitan areas/census agglomerations, this code is NULL.
Census tract
CTUID (3-digit census metropolitan area/census agglomeration code) and (7-character census tract name)
Where there are no census tracts, this code is NULL.
Urban area
UAUID 4-digit urban area code
Where there are no urban areas, this code is NULL.
Economic region
ERUID (2-digit province code) and (2-digit economic region code)
Census division
CDUID (2-digit province code) and (2-digit census division code)
Census subdivision
CSDUID (2-digit province code) and (2-digit census division code) and (3-digit census subdivision code)
Census agricultural region
CARUID (2-digit province code) and (2-digit census agricultural region code)
Census consolidated subdivision
CCSUID (2-digit province code) and (2-digit census division code) and (3-digit census consolidated subdivision code)
Designated place
DPLUID (2-digit province code) and (4-digit designated place code)
Where there are no designated places, this code is NULL.
Dissemination area
DAUID (2-digit province code) and (2-digit census division code) and (4-digit dissemination area code)
Dissemination block
DBUID (2-digit province code) and (2-digit census division code) and (4-digit dissemination area code) and (2-digit dissemination block code)