The four maps on this plate show the extent of areas of Canada which were mapped at various scales as of 1955. The first map shows the areas which were mapped at scales of 1:50 000 and 1:63 360. The second and third maps show the areas mapped at scales of 1:126 720 and 1:190 080, respectively. The last map shows the areas which were mapped at scales of 1:250 000 and 1:253 440.
