81 
Chapter V 
E) REPORT ON THE PARTICIPATION OF THE INTERNATIONAL 
TRAINING CENTRE 
DELFT - NEDERLAND 
Test N. 19 
by 
Ir. J. Visser 
1 — AERIAL PHOTOGRAPHY. USED 
8 parallel strips, 165 photographs taken with the S.O.M.—plate camera; 18 X18 cm 2 , 
/ = 125 mm, 1:65000. 
Triangulation: the contact glass diapositives were observed in the Wild Stereo 
comparator of the I.T.C. (July, 1961). 
Adjustment: I.T.C.—Jerie Block-adjustment. 
2 COMPUTATION OF STRIP-COORDINATES 
In the Stantec-Zebra electronic computer. After reduction of the plate-coordinates 
for the Aquilor-distortion, the van den Hout programme [1] was used to convert the 
plate-coordinates into strip-coordinates. 
Ground-control: in the next phases, the following ground control points have 
been used (exclusively): 
Planimetric ground control: 1,13, 29, 43,152,117, 285, 292, 283 and 271. Total: 10. 
Height control: 1, 2, 20, 21, 35, 43, 44, 46, 59, 74, 76, 96, 114, 117, 136, 152, 
156, 173, 175, 196, 201, 217, 232, 235, 248, 270, 271, 273, 287, 285. Total: 30. 
Also see the diagram with the distribution of these control points in the block 
(diagram No. 1).