PROBLEM 3: A stadia measurement was undertaken with a theodolite having an internal focusing telescope and stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation...


topic: Tacheometry


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  4. final diagram with computed unknown variables


PROBLEM 3:<br>A stadia measurement was undertaken with a theodolite having an internal focusing<br>telescope and stadia interval factor of 98.8. When a backsight was taken on a turning<br>point whose elevation is 205.62 m, the rod interval observed was 1.94 m; and with the<br>horizontal hairs set at 1.50 m on the rod, the vertical angle reading was +13°45'. For a<br>foresight to a control point, the rod intercept was 1.17 m; and with the horizontal hair<br>reading of 1.60 m on the rod, the vertical angle observed was -7°18'. Determine the<br>elevation of the line of sight at the instrument point and the elevation of the point on<br>which the foresight was taken.<br>

Extracted text: PROBLEM 3: A stadia measurement was undertaken with a theodolite having an internal focusing telescope and stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62 m, the rod interval observed was 1.94 m; and with the horizontal hairs set at 1.50 m on the rod, the vertical angle reading was +13°45'. For a foresight to a control point, the rod intercept was 1.17 m; and with the horizontal hair reading of 1.60 m 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.

Jun 11, 2022
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