Table 2: Comparison of fixed-area and angle-count estimates of stand volume, for the 12 000 plots simulated in each measurement year.

Measurement year Fixed-area volume estimate Angle-count volume estimate Mean (m³/ha) Std. dev. Mean (m³/ha) Std. dev. 1977 759.0 231.3 762.5 172.4 1982 769.3 226.3 774.6 161.9 1987 772.7 225.3 775.2 155.1 1992 818.2 241.2 822.4 163.9 1997 798.6 242.5 806.0 158.7 2002 775.5 259.0 780.8 168.0 2007 735.3 275.5 737.1 181.9