Nation and Organization No. of meas. models (1/2) Instru- 
No/Code Organization (Diap. Prag-P, Sthlm-S) | 1:3 500| 1:6 000| 1:12 000 Sum| ment 
118, Sweden 
45/118.5 | Svenska Reproduktions Aktiebolaget 0/1 1/1 1/1 5 A8+EK5 
Vällingby P 
119, Switzerland 
46/119.2 | Swiss School for Photogrammetric 1/1 1/1 1/1 6 AT 
Operators 
St, Gallen PS 
47/119.4 | Institut fiir Geodäsie und Photogram - 1/1 1/1 1/1 6 A" 
: metrie 
e 0 Zürich PS 
129. Union of Socialist Republics (USSR) 
48/129.2 Central Research Institute for Geodesy, | 1/1 1/1 171 6 
Air Survey and Cartography 
Moskow P 
131. United Kingdom 
49/131.2 Hunting Surveys LTD 1/1 0/1 1/1 5 AT 
Herts PS 
50/131.4 Fairey Surveys Limited 1/1 1/1 1/1 6 C8 
Berks PS 
132. United States of America 
51/132.2 Army Map Service 1/1 1/1 1/1 6 C8 
Washington D.C. PS 
52/132,5 U.S. Naval Oceanographic Office 1/1 1/1 1/1 6 C8 
© 0 Washington D,C, PS 
  
  
  
  
  
5. THE MEASUREMENT AND TRANSFORMATION OF MACHINE COORDINATES. 
  
  
Every participant had to measure the machine coordinates of the passpoints and the comparison 
points for the three negative -scales and to note them on a special form. He was furnished with 
photo-mosaics, where all points could be identified, and forms with the geodetic coordinates 
of the passpoints of the first models for the three negative scales. He had to transform the machine 
coordinates according to Helmert and to note the transformed coordinates on a special form,to be 
  
sent to the President of the Working Group IV/I in Stockholm. Also the residual point height-errors