High Quality Content by WIKIPEDIA articles! The Dominion Land Survey (DLS) is the method used to divide most of Western Canada into one-square-mile sections for agricultural and other purposes. It is based on the layout of the Public Land Survey System used in the United States, but has several differences. The DLS is the dominant survey method in the Prairie provinces, and it is also used in British Columbia along the Railway Belt (near the main line of the Canadian Pacific Railway), and in the Peace River Block in the northeast of the province. (Although British Columbia entered Confederation with control over its own lands, unlike the Northwest Territories and the Prairie provinces, British Columbia transferred these lands to the federal Government as a condition of the building of the Canadian Pacific Railway. The federal government then surveyed these areas under the DLS.)