Surveying Distance Measurement Quiz
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Questions and Answers

What is the relative precision achievable by a good pacer under average conditions?

  • 1/200 (correct)
  • 1/100
  • 1/50
  • 1/300

    • What is the first step in determining a person's pace factor?

  • Estimate the last pace without counting
  • Count the number of paces on a known distance (correct)
  • Adjust the pace to a predetermined length
  • Pace along a curvy path

    • How should one ensure accuracy when pacing distances?

  • Walk along a straight line (correct)
  • Count paces loudly to maintain focus
  • Pace with eyes closed
  • Walk quickly to save time

    • What affects the accuracy of pacing distances?

    <p>Deviation from a straight line</p> Signup and view all the answers

    What is the maximum likely error in pacing distances if no mistakes in counting are made?

    <p>3 percent</p> Signup and view all the answers

    What should be done to calibrate an individual’s pace accurately?

    <p>Use a known distance and average paces over multiple trials</p> Signup and view all the answers

    What is the formula to calculate an unknown distance using pacing?

    <p>Pace factor multiplied by average paces</p> Signup and view all the answers

    In which of the following fields is pacing commonly used?

    <p>Geology</p> Signup and view all the answers

    Which factor would generally decrease the length of a pace while pacing?

    <p>Walking on rougher terrain</p> Signup and view all the answers

    What device can a surveyor use to count the number of paces taken?

    <p>Pedometer</p> Signup and view all the answers

    When pacing uphill compared to level ground, the number of paces taken will generally be:

    <p>More than pacing on level ground</p> Signup and view all the answers

    The relationship between fatigue and the length of pace indicates that:

    <p>Increased fatigue reduces the length of pace</p> Signup and view all the answers

    In the illustrative problems, what is the purpose of determining the pace factor?

    <p>To measure the accuracy of distance</p> Signup and view all the answers

    If the surveyor took 771 paces over an unknown distance, the mean of previous trials can be used to estimate the distance based on which value?

    <p>The average pace from previous trials</p> Signup and view all the answers

    Which statement is true regarding the use of pacing on different types of terrain?

    <p>Pacing uphill increases the number of steps taken</p> Signup and view all the answers

    Which of the following does NOT affect the length of a pace?

    <p>Color of shoes</p> Signup and view all the answers

    What is the primary consideration when measuring horizontal distance between two points at different elevations?

    <p>The horizontal length between plumb lines at the points</p> Signup and view all the answers

    Which method of distance measurement is defined as counting the number of steps taken?

    <p>Pacing</p> Signup and view all the answers

    What is the relationship between a stride and paces in surveying?

    <p>A stride is equivalent to two paces.</p> Signup and view all the answers

    Which factor is NOT typically considered when choosing a method for distance measurement?

    <p>Environmental temperature</p> Signup and view all the answers

    Which statement about pacing in surveying is true?

    <p>Pacing is a rapid means of checking measurements taken by other methods.</p> Signup and view all the answers

    What are two commonly employed methods of linear measurement in surveying?

    <p>Taping and Tachymetric</p> Signup and view all the answers

    When distances measured along an inclined line are utilized in surveying, what is done to them?

    <p>They are converted to their horizontal equivalents.</p> Signup and view all the answers

    Which of the following statements about the methods of linear measurement is incorrect?

    <p>Pacing is the most accurate method of distance measurement.</p> Signup and view all the answers

    What is the correct pace factor for the surveyor who counted 50, 52, 53, 51, 53, and 51 paces along a 45-m course?

    <p>0.878 m/pace</p> Signup and view all the answers

    What would be the estimated length of the unknown distance XY, if the pace factor from the previous surveyor is applied to the total paces recorded of 768, 771, 772, 770, 769, and 770?

    <p>680.3 m</p> Signup and view all the answers

    How can the percentage of error be calculated for the measurement if the taped length of XY is 150.5 meters?

    <p>(150.5 - Measured Length)/150.5 * 100</p> Signup and view all the answers

    If a surveying student recorded 142, 145, 143, and 146.5 paces over 100 meters, what is the approximate second distance in meters for 893.5, 896, 891.5, and 897 paces?

    <p>1245 m</p> Signup and view all the answers

    Given the paces recorded for a 125 m line are 161, 165, 159, and 158, what is the calculated pace factor?

    <p>0.790 m/pace</p> Signup and view all the answers

    What is the approximate length of the line if a student recorded repeated paces as 456, 448, 462, 447, 452, and 455, with a pace factor of 0.628 m/pace?

    <p>300 m</p> Signup and view all the answers

    What is the appropriate formula to derive the number of paces required for a new line based on a previously given line?

    <p>Length of new line / pace factor</p> Signup and view all the answers

    If a line of length 100 m was paced with results of 142, 145, 145.5, and 146, what is the estimated number of paces for a second-length line measured in 893, 893.5, 891, and 895.5?

    <p>1400 paces</p> Signup and view all the answers

    Study Notes

    Measurement of Distance

    • The accurate determination of the distance between two points on any surface is a fundamental operation in plane surveying.
    • If the points are at different elevations, the distance measured is the horizontal length between plumb lines at the points.

    Distance by Pacing

    • Pacing consists of counting the number of steps or paces in a required distance.
    • A pace is defined as the length of a step in walking, measured from heel to heel or from toe to toe.
    • Pacing usually involves counting strides, which are equivalent to two paces or a double step.
    • Pacing provides a quick way to check measurements taken by other methods.
    • It is suitable for determining approximate distances, particularly when low precision is sufficient.
    • Distances by pacing are accurate enough for small-scale mapping, locating details, transversing with a plane table, and reconnaissance surveys.
    • Pacing is also used in geology, forestry, engineering, and agriculture.

    Pace Factor

    • The length of someone's pace varies, and this needs to be determined for accurate measurements.
    • The pace factor is calculated by dividing the known distance by the average number of paces needed to cover it.
    • It is expressed in meters per pace.
    • The pace factor is used to calculate distances by multiplying it by the number of paces taken.

    Factors Affecting Pace Length

    • Speed of pacing
    • Roughness of the ground
    • Weight of the pacer's clothing and shoes
    • Slope of terrain
    • Fatigue
    • Age and sex of the pacer

    Distance by Taping

    • The most common method for measuring or laying out horizontal distances is using a graduated tape.
    • Taping involves stretching a calibrated tape between two points and reading the distance indicated on the tape.

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    Related Documents

    Fundamentals of Surveying PDF

    Description

    Test your knowledge on the measurement of distance in plane surveying. This quiz covers methods such as pacing and horizontal length calculations when points are at different elevations. Understand the applications of pacing in various fields like geology and engineering.

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