This classic Canadian 5¢ blue stamp honors David Thompson, the famed fur-trade era explorer and master cartographer whose surveys mapped more than 4.9 million square kilometers of North America. Issued by Canada Post, the design features Thompson in winter gear using a sextant, symbolizing his meticulous surveying methods. A large scroll map of western Canada unfurls across the stamp, representing the regions he charted with remarkable accuracy. The crisp line-engraved style and monochrome blue palette give it a distinguished mid-20th-century commemorative aesthetic prized by collectors. A staple piece for thematic collections on exploration, cartography, or Canadian heritage.