groundtruthing
 n.Note: OED defines this as “the action or process of establishing ground truth,” and defines “ground truth” as “information obtained by direct measurement at ground level, rather than by interpretation of remotely obtained data.” «Checking “hot” spots identified last year by thermal imaging on Bella Vista’s seven lakes should begin in the coming weeks. The process, called groundtruthing, could take up to a year to complete with additional testing next summer.» —“Checking lakes for contamination could take up to 12 months” by Charles Huggins The Weekly Vista Oct. 3, 2007. (source: Double-Tongued Dictionary)

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