The effect of curvature of the earth surface is taken into account only if, the extend of survey is more than:
A216 km
B116 km
C260 km
D160 km
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
Compass surveying is suitable where ................. is the main consideration
If the field temperature is lower than that at which the tape was calibrated, it results in:
Local attraction in compass surveying may exist due to ..............
The circle of contact of earth and the cone of visual rays passing through the point of observation is called:
A digital level reads a: