grade correction

grade correction

[′grād kə‚rek·shən]
(geology)

grade correction

A correction applied to a distance measured on a slope to reduce it to a horizontal distance between the vertical lines through its end points.
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References in periodicals archive ?
Contract Awarded to construct the river protection and runway strip grade correction
Sarah Teather, the party's education spokeswoman, said it was the equivalent of 13 queries and three grade corrections for every secondary school in England.
With a combination of line and grade corrections, the 'points' can be located in any one of the four quadrants of the target depending on the necessary line and grade," he adds.