Measuring Horizontal Angle Using Theodolite || Repetition Method || Reiteration Method || скачать в хорошем качестве

Measuring Horizontal Angle Using Theodolite || Repetition Method || Reiteration Method ||

There are two methods of measuring Horizontal Angle. 1. Repetition Method 2. Reiteration Method 1. Repetition Method:  The repetition method is used to measure horizontal angle very accurately.  In this method, the horizontal angle is measured several times.  The angle should be measured clockwise in the face left and face right position with three repetitions at each face.  The final reading of the first observation will be the initial reading of the second observation. Procedure: • Theodolite is set up Over station A. • Instrument is centered and levelled properly vernier A is set to Zero and B to 180. 2. Reiteration Method:  The reiteration method is used when several angles are to be measured at the same station.  In this method all the angles are measured successively and finally the horizon is closed.  The reiteration method is also known as the direction method or method of series.