datum line


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Related to datum line: datum point

datum line

[′dad·əm ‚līn]
(navigation)

reference line

Any line which can serve as a reference or base for the measurement of other quantities.

datum line

A baseline, or reference line, from which calculations or measurements are taken. See datum.
References in periodicals archive ?
D-R says the Datum line of centrifugal was designed for maximum performance in all pressure and flow applications.
Bruder underscores the latent power of the channel, a deep, ugly cut in the land, by using it as a datum line, overlaying the geometry of the boomerang with a series of lines parallel to the chute.