Columbia subject headings:
Canada--Surveys--History.
Cartography--Canada--History.
Surveyors--Canada.
Harvard subject headings:
Canada--Surveys--History.
Cartography--Canada--History.
Surveying--Canada--History.
Surveyors--Canada.
Princeton subject headings:
Canada--Surveys--History.
Cartography--Canada--History.
Surveying--Canada--History.
Surveyors--Canada.