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Lewis and Clark: Mapping a Continent One Observation at a Time
How compass traverses, celestial observations, Indigenous geographic knowledge, and disciplined field notes shaped the maps of the Corps of Discovery.
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Journeys, navigation, local discoveries, and the stories that give places their character—from Florida landmarks to distant coastlines and ambitious expeditions.
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Featured Story
How compass traverses, celestial observations, Indigenous geographic knowledge, and disciplined field notes shaped the maps of the Corps of Discovery.
Read ArticleHow a retired merchant, local collaborators, astronomy, traverses, and repeated journeys produced Japan’s celebrated Ino maps.
How inertial platforms, optical observations, radio tracking, maps, and reference frames guided Apollo between Earth and Moon.
How reconnaissance, maps, levels, rivers, and competing canal concepts shaped the choice of a route across Panama.
How baselines, giant theodolites, triangulation, and an immense field organization carried a geodetic network across India.
How sextants, chronometers, astronomical tables, and hydrographic surveys made ocean navigation repeatable.
How latitude, dead reckoning, soundings, and disciplined observation guided sailors before dependable longitude.