A stadia measurement was undertaken with a theodolite having an internal focusing telescope and a stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62m, the rod interval observed was 1.94m; and with the horizontal hairs set at 1.50m on the rod, the vertical angle reading was -13°45'. For a foresight to a control point, the rod intercept was 1.17m; and with the horizontal hair reading of 1.60m on the rod, the vertical angle observed was +7°18'. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken.
A stadia measurement was undertaken with a theodolite having an internal focusing telescope and a stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62m, the rod interval observed was 1.94m; and with the horizontal hairs set at 1.50m on the rod, the vertical angle reading was -13°45'. For a foresight to a control point, the rod intercept was 1.17m; and with the horizontal hair reading of 1.60m on the rod, the vertical angle observed was +7°18'. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A stadia measurement was undertaken with a theodolite having an internal focusing telescope and a stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62m, the rod interval observed was 1.94m; and with the horizontal hairs set at 1.50m on the rod, the vertical angle reading was -13°45'. For a foresight to a control point, the rod intercept was 1.17m; and with the horizontal hair reading of 1.60m on the rod, the vertical angle observed was +7°18'. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken.
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