Answer to Question #294656 in Engineering for rainier

Question

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 +13045’. 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 -7018’. Determine the

elevation of the line of sight at the instrument point and the elevation of the point on which the foresight

was taken.