plane surveying


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Related to plane surveying: Geodetic surveying

plane surveying

n
(Surveying) the surveying of areas of limited size, making no corrections for the earth's curvature
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The difference between a horizontal plane and a level surface is the primary difference between the two types of surveying, plane surveying and geodetic surveying.
Since nothing resembling the precision of modern theodolites existed, elevations were determined by an arrangement that was even more cumbersome than plane surveying. A choice of several instruments existed, but whichever was used, vertical offsets were determined, not by measuring angles, but by establishing a horizontal reference at some point and sighting from that point to a measuring rod held vertically at the next survey point.