94 
Table 3. 
The production within the Geographical Survey 
Office of photogrammetric material for the official 
maps 
Aerial photography 
1964 
1965 
1966 
1967 
negatives 
6,580 
13,793 
10,931 
7,538 
area, km 2 
. . 67,000 
101,000 
87,600 
77,000 
Laboratory work 
contact prints 
19,655 
34,412 
28,728 
24,980 
enlargements 
3,202 
2,264 
4,341 
3,585 
rectifications 
7,271 
6,185 
9,464 
7,929 
diapositives 
2,561 
4,277 
4,202 
2,803 
Photogrammetric work 
original photo maps, km 2 
12,325 
17,200 
14,675 
13,650 
drawn maps 1:50,000 „ 
4,100 
3,250 
8,075 
4,750 
contour lines 5 m, „ 
28,400 
13,050 
13,475 
16,075 
Table 4. 
Geographical Survey Office production of aerial 
photography and laboratory work done to order 
1964 1965 1966 1967 
Aerial photography 
negatives 
. . . . 10,946 
12,980 
12,078 
9,685 
area, km 2 
.... 15,500 
23,100 
20,130 
14,785 
Laboratory work 
contact prints 
. . . . 37,123 
33,927 
42,424 
28,024 
enlargements 
. .. . 43,963 
28,565 
32,165 
30,581 
rectifications 
. .. . 1,737 
1,556 
1,554 
1,796 
diapositives 
.. . . 9,041 
10,255 
11,330 
10,438