243 - 
Class 
mid-point 
Actual 
6242 
Fit in 
10 cm 
Fit in 
30 cm 
Actual 
2471 
Fit in 
10 cm 
Fit in 
30 cm 
4 
82.65 
78. 09 
79. 01 
79. 12 
76. 04 
77.48 
7 
13. 54 
17. 36 
16. 72 
15. 34 
18. 54 
17. 61 
10 
3. 04 
3. 85 
3. 53 
4. 69 
4. 52 
4. 01 
13 
0. 77 
0. 70 
0. 74 
0. 85 
0. 90 
0. 90 
Total 
100 
100 
100 
100 
100 
100 
Table 9 
Percentages of trees in 30 cm classes for 6242 and 2471 trees 
RELATIONSHIP BETWEEN CANOPY STRATA AND DIAMETER CLASSES 
With diameters grouped in 30 cm and canopy strata in 5 m. height intervals the 
following correlation table could be set up for the 2471 trees which were located 
on the aerial photographs. 
Canopy strata 
in metres 
Diameter classes 
25 - 55 55 - 85 
in centimeters 
85 - 115 115 - 145 
Total 
22 - 27 
1221 
71 
4 
1296 
27 - 32 
596 
147 
27 
2 
772 
32 - 37 
126 
139 
53 
8 
326 
37 - 42 
12 
22 
32 
11 
77 
Total 
1955 
379 
116 
21 
2471 
Table 10. 
Canopy strata and diameter classes 
The data fitted to a quadratic polynomial. A highly significant regression was 
obtained. The regression equation is given in table 11. 
Equation 
Res. Variance t^ 
l 2 
2 
D = 134.9729 - 8.0719 H + 0.1741 H 
2.0652 8.4283 
10. 9096 
Table 11. 
Regression of diameter on height of canopy stratum 
Table 12 gives diameters and precision estimated with the above regression 
equation.