A field surveyor needs to determine the horizontal distance between two stations located on steeply sloping ground using a steel measuring tape and a plumb bob via the direct stepping method. Arrange the following field procedure steps in the correct chronological order from start to finish.
- 1Insert ranging poles at both the higher station and lower station to establish the straight baseline path across the slope.
- 2The follower holds the zero mark of the tape firmly at the higher station ground point while the leader pulls the tape taut horizontally out over the slope.
- 3Suspend a plumb bob vertically from the elevated handle end of the horizontal tape to transfer the suspended point precisely to the ground.
- 4Insert a steel arrow into the ground at the exact point indicated by the tip of the plumb bob.
- 5Move forward so the follower takes up the newly marked ground point, repeating horizontal steps progressively down the slope until reaching the lower station.
Cevap
The correct procedural order is: (1) Insert ranging poles at both stations to establish the line, (2) Hold the tape zero mark at the upper station and extend the tape horizontally, (3) Suspend a plumb bob from the tape end to transfer the point vertically down, (4) Pin an arrow at the plumb bob tip on the ground, and (5) Advance down the slope repeating the steps progressively.
The stepping method requires first establishing a straight line between the stations using ranging poles. Next, short horizontal segments are extended from the higher elevation toward the lower elevation. A plumb bob is suspended from the elevated end of the horizontal tape to transfer the point vertically to the ground surface, where an arrow is pinned. The team then advances to repeat this sequence progressively down the slope.
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Anahtar Kavram
Direct Stepping Method on Sloping Ground