error of closure
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error of closure[′er·ər əv ′klō·zhər]
Also known as angular error of closure.
The amount by which the measurement of the azimuth of the first line of a traverse, made after completing the circuit, fails to equal the initial measurement.
The amount by which the sum of the angles measured around the horizon differs from 360°.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.