In comparison with former geodetical measurements, using a tape, 
the application of close-range photogrammetry resulted in, 
approximately, a 70$ time-cut and a 30$ cost-cut in spite of the 
use of rather expensive photogrammetric equipment. 
The most remarkable feature of this work is the enormous volume 
of photogrammetric measurements. From March 1974 to the end of 
1977, 23,455 cross-sections of tunnels and metro stations have 
been measured and computed. In 1978, in connection with the 
opening of the second line of Metro in Prague, 15,040 cross- 
sections have been measured. For this reason, 2170 stereopairs 
have already been taken. It would not be possible to fulfil such 
a task without using modern photogrammetric and computational 
technique and highly developed organization.