How did the term benchmark originate and what does it really mean?
#109854. Asked by 29CoveRoad. (Oct 16 09 9:36 PM)
The term benchmark originates from the chiseled horizontal marks that surveyors made, into which an angle-iron could be placed to bracket ("bench") a leveling rod, thus ensuring that the levelling rod can be repositioned in exactly the same place in the future.
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