The method of plotting is the same as before. Preference is given to precision plotters 
designed for the use of one operator only such as Stereosimplex III. Scribing during plotting 
is not suitable for the large scale mapping of planimetry and consequently not used in this 
service. Because the aim is the production of maps for engineering projects and for admin 
istration of finished projects, no numerical, but only graphical photogrammetry is applied 
for mapping. Coordinate registration came into use recently only for aerial triangulation. 
A consequence of its programme of production was the participation in the international 
experiment of working group IV-4 in which also KLM Aerocarto has participated. This 
experiment has involved the measurement of two adjoining models in a strip 1 : 4,000 and 
1 : 5,000 of a stretch of a German highway, taken with a 6" Aviogon camera. The plani 
metry i.e. plotting was in the scale 1 : 1,000 with a contour line interval of 1 m, together 
with terrain cross sections at 25 m intervals with the scale of planimetry 1 : 200 and for 
height 1 : 20. The purpose of this experiment was to collect statistical data about this 
method of preparation of highway projects. The results will be presented by the sub 
commission in a report at the Lisbon Congress. 
The Cartographic Service of the Ministry of Transport and Waterstaat and the Photo- 
grammetric Service of the Cadastre have participated also in the international controlled 
experiment of Working Group IV-1 of the ISP. The task was to determine the machine 
coordinates of 45 check points in the pair 026-028 of the OEEPE Reichenbach test field 
of 1959, taken with the Zeiss Pleogon camera RMK 15/23. The purpose was to collect 
statistical data concerning the precision of as many instruments and operators as possible. 
Two sets of coordinates by each of two different operators repeated with a second relative 
orientation gives 8 sets of coordinates of 5 orientation and 45 check points. A report with 
statistical study of the observed values will be published by the Swedish president of this 
Working Group, Mr. Sven G. Moller. 
The photogrammetric map production of the Military Topographic Service is described 
in detail in the 1960 National report. No great changes have taken place in the plotting 
since then. 
CHAPTER V. APPLICATION OF PHOTOGRAMMETRY TO OTHER THAN 
TOPOGRAPHIC PROBLEMS 
The small number of activities in this field are the following: 
The Laboratory for Geodesy of the Technical University takes part in international 
cooperation on photographic satellite tracking with its department of Prof. Ir. G. J. Bruins. 
See the publication in the Proceedings of the first international symposium on the use of 
artificial satellites for geodesy, Amsterdam, 1963: L. Aardoom and J. C. de Munck: “An 
experiment on photographic satellite tracking” [76]. 
J. C. de Munck of the same laboratory developed a method for the determination of 
the roughness of the skin of ships. A special instrument has been designed and built for 
this purpose. At a distance of about one mm a glass plate of 5 X 7 cm is kept parallel to 
the skin of the ship. On this plate are parallel lines at mutual distances of 5 mm. A bundle 
of parallel light passing under 45° to the glass plate gives shadows of these lines on the 
skin. These shadow lines and the straight lines are photographed with a Kodak-Retina 
camera, the optical axis of which is perpendicular to the glass plate. The shape of the 
shadow lines compared with the image of the straight lines shows the profile of the skin.