CH 3

For Chapter Three's lecture we learned about geodesy-the study of the Earth's size and shape. We also learned about map projections. When you project maps you distort 1 or more of 4 properties. They are shape, area, distance, direction aka SADD =( . We also learned about datums which are reference surfaces used for mapping. Two commonly used datums in the US are NAD27 and NAD83.