and the weight for each point not eliminated in the process: this is 
very useful for the analytical plotter because the sequence of col- 
limation in each photograph becomes pre-determinate (no point is forgot- 
ten) and the value of the required weight imposes the number of col- 
limations on each point or in the surrounding area. 
ACKNOWLEDGMENT 
The authors are grateful to Prof. Luigi Mussio and Prof. Fernando Sansó 
for their valuable suggestions. 
REFERENCES 
/1/ Pope, D.A.,Tompkins, C.: Maximizing functions of rotations-exper- 
iments concerning speed of diagonalisation 
of symmetric matrices using Jacobi's method. 
J.Assoc.Comput.Mach. 4, (1957),pp. 459 - 466. 
/2/ Schaffrin, B.: On some recent modifications regarding the optimal 
design of geodetic networks. 
Geodezja (Krakow), 79, (1983), pp. 43 - 56. 
/3/ Schmitt, G.: Zur Numerik der Gewichtsoptimierung in geodätischen 
Netzen. 
Rep. C. 256, Dtsch. Geod. Komm., Munchen, (1979). 
/4/ Wilkinson, J.H., Reinsch, C.: Handbook for Automatic Computation. 
Vol. II, Linear Algebra, Springer Verlag 
Berlin, Heidelberg, New York; (1971). 
= 159 -