Contained within the 3rd Edition (1957) of the Atlas of Canada is a main map that shows fifteen condensed maps of geostatistical units used by the 1951 Census. The main map shows the census divisions as used in that census to gather, compile and publish many of the results of the censuses of Canada. Census divisions normally correspond to counties, but the Dominion Bureau of Statistics (which is now Statistics Canada) had to create equivalent units for counties in each of Newfoundland, Manitoba, Saskatchewan, Alberta and British Columbia. The main map has a table listing all of the census divisions. Around the main map are individual maps for each of the 15 census metropolitan areas as used in the 1951 Census. Each of these small maps shows the component municipalities in the metropolitan area and also shows the built-up area. These small maps are all at the same scale, which is about 1:650 000.