e © 
  
  
  
  
  
  
  
  
  
Standard errors in x, y and 
z expressed as units of stan- 
dard error of unit weight. 
(5 7 1) 
Fig 6 . Theoretical accuracy 
Fig. 5. Tellurometer MA 100. 
1.209 
1.271 
A 2.495 A 
1.066 0.922 1.066 
2.016 1.427 2.016 
3.402 2.889 3.402 
1.142 1.066 1.142 
2.251 1.587 2.251 
3.962 3.576 3.962 
1.066 0.922 1.066 
2.016 1.427 2.016 
3.402 2.889 3.402 
1.209 
1.271 
2.495 A 
in strip triangulation using 
four bases. 
(E Kilpelà)