Question

explain the procedure to measure the right angle of wall with optical square or open cross staff, in theodolite/total station​

Answer 1

Answer:

$\underline{\huge{Answer:-}}$

it consists of a hollow octagonal box and is used to set out angles of either 45 degree or 90 degree. It consists of two cylinders of equal diameter placed one over each another and is used to set of any angle

Answer 2

Answer:

Answer:

\underline{\huge{Answer:-}}

Answer:−

it consists of a hollow octagonal box and is used to set out angles of either 45 degree or 90 degree. It consists of two cylinders of equal diameter placed one over each another and is used to set of any angle