The zero of the graduated circle of a prismatic compass is located at

Number of subdivision per meter length of a levelling staff is

A simple circular curve is designated by the

In order to determine the natural features such as valleys, rivers, lakes etc., the surveying preferred is

A Bench mark is a

When a chain encounters a river

Invar tapes are made of an alloy of

The object of surveying is to be prepare

Three-point problem can be solved by