Which of the following errors can be eliminated by taking mean of both face observations?

For which of the following permanent adjustments of theodolite, the spire test is used?

The variation of magnetic declination within a day is called ............

One of the tacheometric constants is additive, the other constant, is ............

Surveys which are carried out to depict mountains, rivers, water bodies, wooded areas and other cultural details, are kn…

Drop arrow is used in ............

The method of surveying in which field work and plotting work are done simultaneously, is called ............

The traversing by the method of deflection angles is chiefly used in ............

Detailed plotting is generally done by ............