g104_class1_navigation

g104_class1_navigation - Geography 104 -...

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Earth – Maps and Navigation size/shape/rotation of Earth is fundamental to ocean dynamics - interesting to know history of Earth’s geometry - need to know how to describe location and size of features - bit of navigational history (can use oceans/celestial) Geography 104 - “Physical Geography of the World’s Oceans”
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Greek mathematician, poet, athlete, geographer and astronomer Eratosthenes of Cyrene (c.275-192): http://www.livius.org/aj-al/alexander/alexander_t33.html Interesting to know
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Eratosthenes’ estimate of earth’s diameter http://www.nos.noaa.gov/education/kits/geodesy/media/supp_geo02a.html 360 º x 800 km 7.2º C = C = earth’s circumference = 40,000 km θ = 7.2°
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Eratosthenes’ estimate of earth’s diameter http://www.nos.noaa.gov/education/kits/geodesy/media/supp_geo02a.html 7.2 º 360º = 800 km C C = earth’s circumference = 40,000 km (stadia) θ = 7.2° Modern estimate of Earth’s radius, r e = 6371 km C=2 π r e = 40,030 km
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g104_class1_navigation - Geography 104 -...

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