Pacing and Compass Traverse
GE 1 Fieldwork # 2
Pacing and Compass Traverse
Objectives:
1. To be able to quickly estimate distances by means of pacing method.
2. To be able to determine directions by means of the magnetic compass.
Instruments:
Tape, Markers, Range Poles and Pocket Magnetic Compass
Procedure:
1. Consider the polygon bounded by the sidewalks around Melchor Hall engineering building. Determine the lengths of the engineering block bounding lines by casually walking at the center of the pavement starting from any of its corners, going in a clockwise direction, until you reach the starting point. Take note of the number of paces that you make for each line. Also, determine their lengths using tape.
2. Determine the magnetic direction of the lines using the magnetic compass. The forward and back bearings must be determined for each line.
3. Make a sketch of the compass traverse indicating the perimeter distances and the direction of lines. Table 2 below indicates the required observed bearings
(directions) and taped distances.
Table2. Observed and Adjusted Bearings of the Compass Traverse OBSERVED BEARINGS
LINE TAPED
DISTANCE
FORWARD BACK
1-2
2-3
3-4
4-1
4. Compute the relative precision of the pacing method by comparing the perimeter distance estimated by pacing and the perimeter distance determined by taping.
Relative Precision (RP) = [Taped Distance (TP) – Paced Distance (PD)]/Taped Distance
(TP). Show all necessary computations. The table indicating discrepancy and relative precision is shown in Table 3 below.
Table3. Discrepancy and Relative Precision TAPED DISCREPANCY RELATIVE
LINE NO. OF PACES PACED
DISTANCE
DISTANCE
(PD-TD)
PRECISION
1-2
1
2-3
3-4
4-1 = _____ = ______
5. Write an individual typed report of this fieldwork in A4 size bond papers. Present properly the required results of the followed procedures, brief discussion of the
results
Pacing and Compass Traverse
Objectives:
1. To be able to quickly estimate distances by means of pacing method.
2. To be able to determine directions by means of the magnetic compass.
Instruments:
Tape, Markers, Range Poles and Pocket Magnetic Compass
Procedure:
1. Consider the polygon bounded by the sidewalks around Melchor Hall engineering building. Determine the lengths of the engineering block bounding lines by casually walking at the center of the pavement starting from any of its corners, going in a clockwise direction, until you reach the starting point. Take note of the number of paces that you make for each line. Also, determine their lengths using tape.
2. Determine the magnetic direction of the lines using the magnetic compass. The forward and back bearings must be determined for each line.
3. Make a sketch of the compass traverse indicating the perimeter distances and the direction of lines. Table 2 below indicates the required observed bearings
(directions) and taped distances.
Table2. Observed and Adjusted Bearings of the Compass Traverse OBSERVED BEARINGS
LINE TAPED
DISTANCE
FORWARD BACK
1-2
2-3
3-4
4-1
4. Compute the relative precision of the pacing method by comparing the perimeter distance estimated by pacing and the perimeter distance determined by taping.
Relative Precision (RP) = [Taped Distance (TP) – Paced Distance (PD)]/Taped Distance
(TP). Show all necessary computations. The table indicating discrepancy and relative precision is shown in Table 3 below.
Table3. Discrepancy and Relative Precision TAPED DISCREPANCY RELATIVE
LINE NO. OF PACES PACED
DISTANCE
DISTANCE
(PD-TD)
PRECISION
1-2
1
2-3
3-4
4-1 = _____ = ______
5. Write an individual typed report of this fieldwork in A4 size bond papers. Present properly the required results of the followed procedures, brief discussion of the
results