This is a classic Fundamentals of Surveying question! The curvature of the earth and the refraction of light through the earth’s atmosphere are two systematic errors are two things that every surveyor (and mariner) must deal with. How do curvature and refraction alter the surveyor’s line-of-sight, and what magnitudes are associated with C+R? Answer this question correctly and earn some major surveying cred.
The Question:
Anyone worth her salt knows that correcting for curvature and refraction is essential when running long trig levels. What statement best describes the effects of curvature and refraction when measuring long distances?
Answer Choices
A) The correction for curvature is negative and the correction for refraction is positive.
B) The correction for curvature is positive and the correction for refraction is positive.
C) The correction for curvature is positive and the correction for refraction is negative.
D) Fences that are referenced in the original survey may serve as artificial monuments.
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