Common use of Accuracy Assessment Clause in Contracts

Accuracy Assessment. Estimated Canopy Percent Cover was within ± 25% of field estimated canopy cover for 63 of the 113 plots [56% of all plots]. This outcome is similar to imagery predictions of crown diameter, which are strongly dependent on how individual trees are identified from imagery. As the TDA is configured to fit the majority of plot compositions [Xxxxxxx Firs and Western Hemlocks] there are outliers that warrant a more dynamic approach. The field estimates of the canopy cover were estimated using a spherical densiometer. While this estimate is lacking some objective rigor that is associated with other metrics, it still provides an insight as to how well imagery algorithms are classifying tree canopy area per plot. Imagery predictions were generally underestimating the canopy percent cover when compared to field data. This follows in suit with crown diameter estimations, which were also underestimated more often than overestimated.

Accuracy Assessment. Estimated Canopy Percent Cover was within ± 25% of field estimated canopy cover for 63 of the 113 plots [56% of all plots]. This outcome is similar to imagery predictions of crown diameter, which are strongly dependent on how individual trees are identified from imagery. As the TDA is configured to fit the majority of plot compositions [Xxxxxxx Firs Xxxx and Western Hemlocks] there are outliers that warrant a more dynamic approach. The field estimates of the canopy cover were estimated using a spherical densiometer. While this estimate is lacking some objective rigor that is associated with other metrics, it still provides an insight as to how well imagery algorithms are classifying tree canopy area per plot. Imagery predictions were generally underestimating the canopy percent cover when compared to field data. This follows in suit with crown diameter estimations, which were also underestimated more often than overestimated.