Posted On :

The method of reiteration is another method of measuring horizontal angles. This method is useful when a number of angles are to be measured at one point.

**Method of
Reiteration in Theodolite**

The method of
reiteration is another method of measuring horizontal angles. This method is
useful when a number of angles are to be measured at one point. In Fig. 6.7,
let O be the point where the instrument is set up and P, Q, R, and S be the
stations. Angle POQ, QOR, and ROS are to be measured. In the retiration method,
each angle is measured in succssion and finally the line of sight is brought
back to P, i.e., the line of sight is made to close the horizon. The instrument
is turned through 360°. Obviously, the instrument should read, upon closing the
ho-rizon, the same reading set initially at P. The procedure is as follows.

1. Set up and level the theodolite at O. Keep the instrument in the
normal posi-tion, i.e., face left. Set the vernier at A to read zero using the
upper clamp and upper tangent screw. Check that the vernier at B reads 180°.

2. Loosen the lower clamp and swing the instrument to bisect the
station mark P Tighten the swrew and using the lower tangent screw finaly bisect the signal

3. at at P. Check that the verniers at A and B read zero and 180°,
respectively.

4. Release the upper plate with the upper clamp, swing the instrument
clockwise to bisect the signal at Q. Tighten the clamp and using the upper
tangent screw, bisect the mark at Q exactly.

5. Read the verniers at A and B and record both the readings.

6. Release the upper clamp screw, bisect the signal at R. Tighten the
clamp and bisect the mark at R exactly with the upper tangent screw. Read the
verniers at A and B and record the readings.

Continue the procedure with other stations.

–POQ = 68° 32¢ 30?, –QOR =
61° 41¢ 10?, –ROS = 102° 54¢ 20?

Tags : Civil Surveying - Theodolite Surveying

Last 30 days 250 views
Related words : ### What is Method of Reiteration in Theodolite Define Method of Reiteration in Theodolite Definition of Method of Reiteration in Theodolite where how
meaning of Method of Reiteration in Theodolite
lecturing notes for Method of Reiteration in Theodolite lecture notes question and answer for Method of Reiteration in Theodolite answer
Method of Reiteration in Theodolite study material Method of Reiteration in Theodolite assignment Method of Reiteration in Theodolite reference description of Method of Reiteration in Theodolite
explanation of Method of Reiteration in Theodolite brief detail of Method of Reiteration in Theodolite easy explanation solution Method of Reiteration in Theodolite wiki
Method of Reiteration in Theodolite wikipedia how why is who were when is when did where did Method of Reiteration in Theodolite list of Method of Reiteration in Theodolite school assignment college assignment
Method of Reiteration in Theodolite college notes school notes kids with diagram or figure or image difference between Method of Reiteration in Theodolite www.readorrefer.in - Read Or Refer

Recent New Topics :