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control point

noun, Aerial Photogrammetry.
a point located on the ground by precise surveying that when identified on aerial photographs provides the control necessary for producing a photomap.
Origin of control point
1925-30 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for control point
Historical Examples
  • It was the first time either of them had seen the blockhouse, the control point from which the rockets were fired.

    The Scarlet Lake Mystery Harold Leland Goodwin

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