Assessing Forest Production Using Terrestrial Monitoring Data

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