Contained within the Atlas of Canada's Reference Map Series, 1961 to 2010, is an enlargement of a 1: 15 000 000 sheet of the same name from the National Atlas of Canada, 4th Edition. Both maps show a very dense network of lakes, rivers and glaciers, with all of the data being photo-reduced from much larger-scale topogaphic maps. Provincial and territorial boundaries are shown, but otherwise there are no other names or symbols shown on the Canadian land surface. The data is as of 1968 (and, therefore, predates the building of many large reservoirs).