Contained within the Atlas of Canada's Various Map Series, 1965 to 2006, is a bilingual map that how status of 1:50 000 mapping as of May 15, 1994. The base map has the grid of 1: 50 000 sheet outlines, and each square is coloured in one of four colours to indicate the latest revision status of each of map. Note that maps in progress have a colour, as do areas not yet mapped at 1: 50 000. The map was produced by the Topographic Mapping group of Natural Resources Canada, although no authorship is given.