Accuracy of Standing-Tree Volume Estimates Based on McClure Mirror Caliper Measurements

摘要

The accuracy of standing-tree volume estimates, calculated from diameter measurements taken by a mirror caliper and with sectional aluminum poles for height control, was compared with volume estimates calculated from felled-tree measurements. Twenty-five trees which varied in species, size, and form were used in the test. The results showed that two estimates of total cubic volume in the 25 trees, obtained by separate measurers who used the mirror caliper and worked independently of one another, were within 2.1 percent of the total cubic volume calculated from the felled-tree measurements.