Field Measurements CE 115
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This 2 page Study Guide was uploaded by Roma Heaney on Monday October 5, 2015. The Study Guide belongs to CE 115 at Christian Brothers University taught by Raymond McGinnis in Fall. Since its upload, it has received 14 views. For similar materials see /class/219437/ce-115-christian-brothers-university in Civil Engineering at Christian Brothers University.
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Date Created: 10/05/15
CE 115 FIELD MEASUREMENTS Linear Measurements SG S Name In plane surveying the distance between two points is always the distance Linear measurements may be obtained by the following methods GPS and aerial photography GPS EDM and aerial photography are the most widely used methods is a quick easy method of determining a ballpark measurement Under most circumstances an accuracy of l to l is obtainable using this method An is a measuring wheel used to measure distances An accuracy of 1 can be obtained using this instrument A is a suitable device for measuring short distances less than 150 feet It has an accuracy of l Hunters use these to measure distances is a surveying method used to quickly determine the horizontal distance to and the elevation of a point This method is employed in developing topographic maps It has an accuracy of l The method was often used in the past to obtain distances over inaccessible courses such as bodies of water Conventional taping methods result in an accuracy of l The future of surveying belongs to GPS GPS stands for In measuring the distance between two points on a steep slope rather than breaking tape every few feet it may be more desirable to tape along the slope and convert the slope distance into a horizontal distance The theorem is used to compute the horizontal distance given the distance and the distance The three fundamental sources of errors in taping include errors errors and errors Cite an example of each Some errors in measurement can be corrected These include and Refer to Table 61 on page 142 Systematic errors are the type of errors that can be corrected Random errors tend to balance and are usually neglected when corrections are applied to measurements Errors for and can be either systematic or random Typically errors involving and tend to be systematic Errors involving human performance factors such as and are generally random A distance between two points is measured to be 56575 with a 100 steel tape Upon returning to the office it is determined that the steel tape used to take the measurements is actually 10002 Compute the actual corrected distance in the field A building comer is to be laid out using a 50 cloth tape The dimension to be laid out is 11000 The actual length of the cloth tape is 4995 Determine the actual corrected distance to be laid out using the tape
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