CONS 127 Lecture 2: CONS 127 - Observing Distance and Scale Jan 11 2018
21 Sep 2018
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Sphere: distance from the centre of the earth to the equator and distance form the centre of the earth to the poles should be the same. **of course, this calls for perfect measurements which our earth does not fall under. Ellipsoid: remember that this model is where the earth fatter at the sides. However, earth is not representative of this model either. Gravity is why the earth is a bit lumpy earth falls into definition geoid. Arctic circle: sun will either be absent (never rise) for 24 hours or never set for 24 hours. Mercator map: this important map preserved angles professor coops "this map preserves the angles on a compass" this is why is was important for sea navigation. Shape of countries was generally right however, the area was wrong. Planar projection: fun fact remember it looks like a bull"s eye. Historical measurements: a lot of our earliest measurements were based on the hand i. e. hands, fingers, thumbs.
