TRIANGULATION WORK PROCEDURE

1. FOUR (4) intervisibility stations is made up as far as possible.2. TWO (2) stations are selected from the triangulation scheme as base line. In diagram 1.0

station 4 and 1 is selected as base line.3. The total station is must be protected from direct sunlight during observation by using

umbrella to eliminate error.4. Set up the total station at station 1 and set up the reflector prism on the station 4 as R.O

(reference object).5. Using face-left reading, set the value for the R.O and open the angles the other THREE

(3) stations in a clockwise direction. Then, repeat for face-right readings on the same directions.

6. All the angles observation and distance are are recorded in the field book or booking form provided as in Appendix 1.

7. Repeat the procedure number 5 and 6 at all FOUR (4) new zero settings.8. Compute for mean angles observe for each stations.

RESULT:

1. One complete field book or booking forms in which the mean angles are computed.2. Using the mean angles compute using equal shift method as in Appendix 2.3. Calculate the coordinate of the FOUR (4) observed stations using the one known

coordinate station derive from solar observations of the baseline in RSO.4. Perform coordinate transformation from RSO to GDM 2000 format using any suitable

software.

STN 3

STN 1

STN 4

STN 2Diagram 1.0