Contained within the 3rd Edition (1957) of the Atlas of Canada is a map that shows a map with four condensed maps comparing Quebec City and Montreal. The first two maps show stages of urban growth for Quebec City for periods ranging from 1608 to 1955 and Montreal for periods ranging from 1642 to 1955. The urban growth maps on the other two maps, represent the expansion of areas occupied by structures, yet the small open areas classified as parks and playgrounds on the land-use maps are also included. These two remaining maps show the extent and classification of land use for 1955 for both of these cities. The classifications for land-use maps were seperated into: Industrial buildings; Industrial yards; Commercial buildings; Commercial yards; Railways and their installations; Institutional buildings; Residential buildings; Cemetaries; Dominantly farm land; Vacant land. In areas classified as dominantly farm land, vacant land includes forested areas, swanps, bogs and all large areas not put to specific agricultural use.