GLOBE® 2005
Appendix - 3
.02
.03
.05
.07
.09
.11
.12
.14
.16
.18
.19
.21
.23
.25
.27
.29
1°
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Angle
.31
.32
.34
.36
.38
.40
.42
.45
.47
.49
.51
.53
.55
.58
.60
.62
Tan.
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Angle
.65
.67
.70
.73
.75
.78
.81
.84
.87
.90
.93
.97
1.00
1.04
1.07
1.11
Tan.
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Angle
1.15
1.19
1.23
1.28
1.33
1.38
1.43
1.48
1.54
1.60
1.66
1.73
1.80
1.88
1.96
2.05
Tan.
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
Angle
2.14
2.25
2.36
2.48
2.61
2.75
2.90
3.08
3.27
3.49
3.73
4.01
4.33
4.70
5.14
5.67
Tan.
Example: Assume you have established a baseline distance of 60.0 meters. Assume that you have measured the tree top to an angle of 34°.
From the Table, you will see that the tangent of 34° is 0.67. Therefore, the tree height above your eye height is 60.0 m x .67 = 40.2 meters.
By adding your eye height above the ground (1.5 m), the total tree height is 41.7 meters.
Tan.
Angle
Table LAND-A-1: Table of Tangents
Land Cover/Biology