FIELDRP1

FIELD WORK REPORT NO. 1

Mabuti, Roy Jason M. 2013107712 CE120-0F/A4

GRADE

Group No. 3

Pacing on Level Ground Page 1

MAPUA INSTITUTE OF TEHNOLOGY ELEMENTARY SUREYING FIELD WORK REPORT

˜Table of Contents˜ Page 2 Introduction Page 3 Objectives and Instruments Page 4 Procedures and Computation Page 6 Questions and Problems Page 9 Preliminary Data Sheet Page 10 Final Data Sheet Page 12 Research and Discussion Page 13 Conclusion Page 14 Fieldwork Peer Assessment

Chief of party: Araracap, Jasper Date of field work: July 20, 2015 Date of submission: July 27, 2015


INTRODUCTION

Pacing is a reasonably easy and quick method of measuring distance in the field. This fieldwork is about determining the pace factor of an individual.

The pace factor is determined by getting the product of the sum of steps by the known value of the line or course. From getting the pace factor by pace or one step, or by the stride or double step, you can use your own pace factor to measure a line or a course.

Knowing pace factor is very useful in the field of engineering specifically in civil engineering in the field of surveying when you don't have an instrument in measuring a long distance of course or a line. Different people have their own pace factor so every individual differ on other pace factor.

To know the distance of the course you want to measure, it is by getting the product of your pace factor

to the sum of the steps or the pacing of the course or line. This is significant for all the engineering for their field works.


OBJECTIVES AND INSTRUMENTS

Objectives:

To obtain individual pace factor. To determine an unknown distance by individual pacing.

Instruments: Two range poles Chalk (for pavements) 2 marking pins (for soft grounds) 50 meter tape

Meter tape-Used to measure

distance between two points

Range pole- A conspicuously

painted pole held upright to show

the position of a survey mark.


PROCEDURES AND COMPUTATION Procedure:

A) 1. The professor measures and designates a 50m course on a level

ground. (Remember to remove the tape while the students will be pacing on the course to prevent them from using the tape as a basis for a straight course.)

2. The ends of the assigned course are marked with either hubs or

marking pins or, by chalk marks if on pavements. Designate the points as A and B.

3. Set or hold range poles behind points A and B or outside the

course AB. These poles will aid the students to travel in a straight path. 4. Each student should take turn pacing on the course from A to B

starting with heel or toe over A, keeping their eyes focus on the range pole behind point B to keep themselves on a straight path. One has to walk in their natural unaffected manner, and has to keep counting their number of paces for the entire course being oared. A partial pace at the end of the course should be figured out to the nearest one fourth of a pace. Record this as the number of paces for Trial No. 1.

5. For Trial No. 2, each student should walk from B to A in the same manner as in the first trial.

6. Repeat steps 4 and 5 for the subsequent trials to comply with

the number of trials required by the professor. 7. Data should be entered in the preliminary data sheet.


B) 1. The professor marks the ends of a level course to be paced by

each student.

2. Range poles are to be set up outside the level course to straighten the path of the student. 3. Each student paces the course with the minimum number of trials as required, recording the number of paces for each trial. 4. The professor, after all field notes shall have been submitted, assign two students to make an actual taping of the course to determine its actual taped distance.

Computation: A)

𝑁 = 𝑚𝑒𝑎𝑛 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑝𝑎𝑐𝑒𝑠 =𝑠𝑢𝑚 𝑜𝑓 𝑡ℎ𝑒 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑝𝑎𝑐𝑒𝑠

𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑡𝑟𝑖𝑎𝑙𝑠

𝑃. 𝐹. =𝑙𝑒𝑛𝑔𝑡ℎ 𝑜𝑓 𝑐𝑜𝑢𝑟𝑠𝑒

𝑚𝑒𝑎𝑛 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓𝑝𝑎𝑐𝑒𝑠∙ 𝑚/𝑝𝑎𝑐𝑒

B)

𝑁 = 𝑚𝑒𝑎𝑛 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑝𝑎𝑐𝑒𝑠 =𝑠𝑢𝑚 𝑜𝑓 𝑡ℎ𝑒 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑝𝑎𝑐𝑒𝑠

𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑡𝑟𝑖𝑎𝑙𝑠

𝑃. 𝐷. = 𝑁 ∗ 𝑃. 𝐹.

%𝐸𝑟𝑟𝑜𝑟 =|𝑇𝑎𝑝𝑒𝑑 𝑑𝑖𝑠𝑡𝑎𝑛𝑐𝑒 − 𝑃𝑎𝑐𝑒𝑑 𝐷𝑖𝑠𝑡𝑎𝑛𝑐𝑒|

𝑇𝑎𝑝𝑒𝑑 𝑑𝑖𝑠𝑡𝑎𝑛𝑐𝑒∗ 100%


QUESTIONS AND PROBLEMS

1. Why is it important to know the individual’s pace factor?

Knowing pace factor is very useful in the field of engineering specifically in civil engineering in the field of surveying when you don't have an instrument in measuring a long distance of course or a line.

2. Name three most important pointers that an individual must remember to follow in order to make his/her approximation of the distance of an unknown course to be as accurate as possible.

Remember to travel in a straight path. Remember to walk in a natural unaffected manner Remember to focus while counting the number of paces

3. A student tries to measure the perimeter of a small park of his community by pacing around the area for three consecutive times. The no of paces was tallied at 535,543, and 539 respectively, for each trial. If the student’s pace factor is 0.74 m/pace, determine the actual perimeter of the land.

Mean = 535 + 543 + 539

3

= 539

Perimeter = (mean) ∗ (pace factor)

= (539) ∗ (0.74)

Perimeter = 398.86m


4. Every morning Joy walks to school from her boarding house and takes only a single route. For five consecutive days, she tries to count the number of paces she makes. Monday morning’s number of pace made by Joy is listed as 345 paces. On Tuesday, 353 paces; Wednesday, 358 paces; Thursday, 348 paces and, lastly, on Friday 355 paces. That Friday afternoon, a surveyor from City Engineer’s office who is tasked to lay out a new drainage piping system, measured the exact route she took and found out that the taped distance is 275m. What is Joy’s pace factor?

mean =345 + 353 + 358 + 348 + 355

5

= 351.8

Pace factor =Taped distance

mean

=275

351.8

Pace factor = 0.78 m/pace


5. The table shown below was taken from Jack’s notes when he tried to determine the perimeter of his newly acquired agricultural piece of land. Knowing that his pace factor is 0.81, determine the perimeter of his lot. Complete the table:

TRIAL

LINE

NO. OF

PACES

PACED

FACTOR

PACED

DISTANCE

PERIMETER

1 AB 125.25

0.81

101.45

97.17

2 BC 85 68.85

3 CD 79.5 64.4

4 DE 133 107.73

5 EF 185 149.85

6 FA 112 90.72

P.D. = (N) * (P.F.)

P.D1= (125.25) (0.81) = 101.45

P.D2= (85) (0.81) = 68.85

P.D3= (79.5) (0.81) = 64.4

P.D4= (133) (0.81) =107.73

P.D5= (185) (0.81) = 149.85

P.D6= (112) (0.81) =90.72

Perimeter = sum of all the pace distance

= 588m


PRELIMINARY

DATA

SHEET


FINAL

DATA

SHEET


Sketch: jbkbjkbjkkkkkkkk

Determination of individual’s pace factor.

Mr. De Torres was counting his steps from point A to B

(50meters)

Determination of an unknown

distance using individual’s pace

factor. Mapua rooftop)


RESEARCH AND DISCUSSION Principle:

A pace maybe measured from heel to heel or from toe to toe. While half a piece is from the toe of one foot to the heel of the other foot. To keep one on the line while pacing, it is good practice to fix his eyes on a distant object at the range behind the pole on the farther end of the line being paced. Since the accepted precision of measuring distance by pacing is 1/300, it should be used only for estimating distances such as those used for sketching and making reconnaissance surveys.


CONCLUSION

In this fieldwork, I learned the importance of knowing my own pace factor. It is very useful whenever I needed to measure the distance of a course without using any instruments.

I think one source of error using pacing is not

walking in a straight path. Sometimes walking without a mark makes it difficult to walk directly.

I can now estimate a distance on a field using only

my pace factor!

FIELDRP1

Documents

individual pace factor

instruments page

level ground page

introduction page

computation page

straight course

conclusion page

discussion page