Field Notes From the Armchair Geographer Revisting the 69-mile Rule The ‘69’-mile rule was always a good way to estimate the circumference of the Earth. Since 1 degree of a Great Circle = 69 miles (approximately), th - Horizontal coordinate system - Document - PDFSEARCH.IO

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	Field Notes From the Armchair Geographer Revisting the 69-mile Rule The ‘69’-mile rule was always a good way to estimate the circumference of the Earth. Since 1 degree of a Great Circle = 69 miles (approximately), th Add to Reading List Document Date: 2011-08-12 16:01:17 Open Document File Size: 142,27 KB Share Result on Facebook City Quito / / Country Ecuador / / Position Armchair Geographer / / SocialTag Lines of latitude Celestial coordinate system Tropics Latitude Longitude Equator Horizontal coordinate system Rotation Pi Cartography

Field Notes From the Armchair Geographer Revisting the 69-mile Rule The ‘69’-mile rule was always a good way to estimate the circumference of the Earth. Since 1 degree of a Great Circle = 69 miles (approximately), thAdd to Reading List