In 1959, I ran the survey party for the then new and sparsely settled City of Troy. The correction in length for temperature changes of a flat steel tape is:
C=0.0000065[[Tt-T)L
where C is the correction, Tt is the ambient temperature, T is the baseline temperature [[68F), and L is the standard length [[100ft)
ETA: The old standard when you fudged a closure was "close enough for highway work".
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