No. 
Stratum I 
- 5 metres 
Stratum II 
- 10 metres 
Stratum III 
- 15 metres 
Total 
Pan 
I. R. Colour 
Pan 
I. R. Colour 
Pan 
I. R. Colour 
Pan 
I. R. Colour 
1 
3 
5 
30 
37 
72 
84 
108 
110 
2 
11 
12 
46 
49 
83 
86 
117 
120 
3 
4 
4 
12 
14 
42 
46 
121 
124 
4 
1 
1 
10 
11 
29 
32 
105 
108 
5 
20 
19 
50 
48 
82 
77 ' 
119 
129 
6 
20 
20 
58 
58 
107 
104 
132 
137 
7 
13 
12 
49 
41 
94 
70 
127 
132 
8 
4 
4 
19 
19 
38 
54 
118 
133 
9 
6 
6 
14 
14 
62 
58 
111 
118 
10 
3 
3 
17 
17 
52 
43 
106 
116 
Total 
85 
86 
305 
308 
661 
654 
1164 
1226 
Table 3. 
Stratified crown counts for panchromatic and 
infrared colour on 10 one hectare photoplots 
PHOTO COUNTS AND FIELD ENUMERATION ON A BLOCK OF 60 HECTARES 
On the 23 x 23 cm. aerial photographs of the panchromatic black and white 
coverage which was acquired in 1973, a block of 60 hectares of dry-land forest 
was selected. The block was divided into 60 one hectare plots which were laid 
out in the field. Crowns were delineated on the aerial photographs and a crown 
plan was prepared. 
In the field, all trees larger than 25 cm. at breast height, or if there were 
buttresses, at 20 cm. above these, were enumerated. Diameters were measured 
to the nearest cm. and the local names of the species were noted. The position 
of each enumerated tree was indicated on a tree plan. In each plot of one hectare, 
the height of the tallest tree was measured to the nearest metre with a Haga 
hypsometer. The location of the highest tree in the plot could generally be found 
on the aerial photographs without too much difficulty. This was different for the 
other enumerated trees on the tree plan. Of the 60 plots, 5 were rejected 
because they contained patches of creek forest. On the remaining 55 plots, 
6242 trees were enumerated. Of these, 2471 could be located on the aerial photo 
graphs and marked on the crown plan. These were counted on the photos in four 5 m