The following data were obtained by stadia measurement:vertical angle = +18°23’, and observed stadia intercept = 2.20 m.The stadia interval factor of the instrument used is 95.5 and C =0.30 m. If...




  1. The following data were obtained by stadia measurement: vertical angle = +18°23’, and observed stadia intercept = 2.20 m. The stadia interval factor of the instrument used is 95.5 and C = 0.30 m. If the height of the instrument is 1.62 m, and the rod is taken at 1.95 m.



  1. Determine the vertical distance from the center of the instrument to point on the rod bisected by the horizontal cross hair.

  2. Determine the inclined or slope distance from the instrument center to the portion on the rod bisected by the horizontal cross hair.



  1. Two hills 100 km apart had elevations of 80 m and 230 m respectively. What would be the minimum height of tower that could be constructed at B so that it would be visible from A considering the effect of curvature and refraction correction.

  2. Two hills A and C have an elevation 0f 680 m and 620 m respectively. In between A and C is another hill B of elevation 645 m and located 12 km from A and 15 km from C. Consider the effects of earth’s curvature and atmospheric refraction.



  1. Compute the elevation of the line of sight at B so that A and C are intervisible.

  2. Find the equal height of towers constructed at A and C so that the three hills are intervisible.

  3. Find the height of tower constructed at A so that B and C are still intervisible.



  1. Two points A and B are 2000 m each away from point C, from which the measured vertical angle to A is +1°30’ and to B is -2°30’. Considering the effect of the earth curvature and refraction.



  1. Compute the difference in elevation between A and C.

  2. Compute the difference in elevation between A and B.

  3. Compute the at point C if elevation B is 55.6 m.


Oct 14, 2022
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