Census Metropolitan Area (CMA)
Formed by one or more adjacent municipalities centred on a large urban area (known as the urban core). To form a census metropolitan area, the census population count of the urban core has to be at least 100,000.
(Sancton 2005, 318)
To be included in the Census Metropolitan Area (CMA) or Census Agglomeration (CA,) other adjacent municipalities must have a high degree of integration with the central urban area, as measured by commuting flows derived from census place of work data.
Statistics Canada, 2004, cited in Sancton, Andrew. 2005. "The Governance of Metropolitan Areas in Canada." Public Administration and Development 25 (4): 317-327.