A vertical photograph of a flat area having an average elevation of 250m above mean sea level was taken with
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- Surveying - Typed Solution onlyQ- A vertical photograph of a flat area having an average elevation of 250m above mean sea level was taken with a camera of focal length 25 cm. A section line AB 300 m long in the area measures 15cm on the photograph; a tower BP in the area also appears on the photograph. The distance between images of top and bottom of the tower measures 0.5 cm on the photograph. The distance of the image of the top of the tower is 10 cm. Find the actual height of the tower.Survey The stadia readings with a horizontal sight on a vertical staff held 40 m away from a tacheometer were 1.385 m and 1.780 m. The focal length of the object glass was 25 cm. The distance between object glass and trunnion axis of the tacheometer was 12 cm. Solve for the stadia interval.
- Q- A vertical photograph of a flat area having an average elevation of 250m above mean sea level was taken with a camera of focal length 25 cm. A section line AB 300 m long in the area measures 15cm on the photograph; a tower BP in the area also appears on the photograph. The distance between images of top and bottom of the tower measures 0.5 cm on the photograph. The distance of the image of the top of the tower is 10 cm. The actual height of the tower is..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 degree 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 degree 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 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.
- 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 turningpoint whose elevation is 205.62 m, the rod interval observed was 1.94 m; and with thehorizontal 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 hairreading 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.Note:hand written solution should be avoided.Problem 2 - A 23 m line was measured using the stadia method. The engineer found out that the reading in the upper and lower hairs are to be 1.25 m and 0.65 m respectively. For internal focusing telescope used in this survey, the stadia constant C is zero. Determine the distance of another line measured by the same instrument when the upper and lower hair reading are 1.47 m and 0.35 m respectively.