GEOG 222.3 Lecture Notes - Lecture 3: Arctic Circle, World Geodetic System, Murchison Promontory
Document Summary
Arctic circle - 23. 5 degree to the north pole (66, 105 degree) - you can experience 24 hour day tome and night time topical something - south to the south pole. The equator (equator bulge), because the earth rotates. Ellipsoid - a hypothetical line that represents earth. Geoid - a reference line to do the measurement of the earth. 1 degree = 111 km (south to the north) There are 36 sections in a town ship. Each section is 1 km by 1 km. There are 6 sections in a township. Nadir - point directly below the observer, cant be seen. Azimuth - angle from north true to the perpendicular arc from star to horizon. Altitude - angle above the horizon to an object. They de ne degrees latitude relative to the equator. They de ne degrees longitude relative to the prime meridian. Small circle: circles produced be a plane passing though a sphere anywhere except the centre.
