My dad was a surveyor for 15 years. Part of his job was to determine property lines between two pieces of property to so one person knows where his property ends and their neighbors begins. He also used trigonometry to map out center islands or dividers on city streets and he also determines the steepness and grades of major freeways. It may not sound important but basically freeways could not be built without surveyors and they had a lot of responsibility.

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Plotting or studying.

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