what is a census agglomeration
A census metropolitan area (CMA) or a census agglomeration (CA) is formed by one or more adjacent municipalities centred on a population centre (known as the core). A CMA must have a total population of at least 100,000 of which 50,000 or more must live in the core based on adjusted data from the previous Census of Population Program.
A census metropolitan area (CMA) or a census agglomeration (CA) can have more than one core. The boundaries and population data for the cores that are used to delineate CMAs and CAs are taken from the previous census.