from The Century Dictionary.

  • noun The determination of the exact point on the ground vertically beneath a point at some height above it, by letting fall a knife or other pointed object; also, the use of this method in measuring land on a hillside so as to obtain the measures projected upon a horizontal plane.


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  • I have, just today, seen alternate definitions:

    1 approaching the complicated, in small steps

    1.1 the act of dealing with an overwhelming or difficult task by breaking it down into smaller, more manageable parts. ( May 1, 2020)

    Both of those seem eminently useful beyond the surveying-specific original.

    March 19, 2021