Zero error (if the device doesn’t have a zero or isn’t3. Make a reconnaissance of the area and select a suitable framework (chain lines) and stations based on the criterion given in Note 1. Introduction of surveying in Civil Engineering. See our User Agreement and Privacy Policy. Measure the offsets/or ties from every necessary point on the detail to the corresponding base line. Principle ,procedure,errors & correction of chain survey. Now customize the name of a clipboard to store your clips. In this free video lecture, Prem Sir has solved some more numerical on Errors in Chain Surveying in Hindi. 3. This is provided for the easy reading of measurements. are done in the office. Here only linear measurements are made i.e. Collimation error Correction: Check before use and equalise sights. Such stations may be : (a) Main stations (b) Subsidiary stations (c) Tie stations 9. This is lecture 6 of Surveying in Hindi. In this survey only measurements are taken in the field, and the rest work, such as plotting calculation etc. If the length of the chain is long, then the measured distance is smaller and the error is negative. When a field measurement is taken, the acceptable error may be more or less than what the chain was designed for. If carefully done, it gives quite accurate results. This field work will continue for 3 field hours. 2. Chain survey is the simplest method of surveying. Chain Surveying • Chain (Tape) surveying is the simplest form of detail surveying. Chain surveying and offset 1. Errors are traditionally been classified into three types. The cumulative errors are those which occur in one direction only and go on cumulating. It may or may not actually meet those specifications. Systematic errors are constant under constant measuring conditions and change as conditions change. In this method the lengths of lines marked on the field are measured, while the details are measured by offsets and ties from these lines. Looks like you’ve clipped this slide to already. Chain Surveying – Chain triangulation, Survey stn., lines, locating ground features, field work, instruments for setting out basic problems in chaining, obstacles in chaining Module –II (10 Hrs) 4. Under sensitive bubble. It is the most Important line, fixes up the directions of all other lines. This is lecture 7 of Surveying in Hindi. 4 These errors are serious errors and cannot be detected easily. For high precision work, we need to measure several known distances and determine if this chain is the proper length. Types of Chains and Tapes in Civil Survey. Type of Levelling Error: Correction: 1. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Errors occur because of:Errors occur because of: 1. These errors may be sometimes positive and sometimes negative.he following are the examples of such errors: (i) Incorrect marking of the end of a chain. At the ends chain is provided with brass handle with swivel joint so that it can be easy to roll or unroll the chain without twisting and knots. Clipping is a handy way to collect important slides you want to go back to later. 2. See our User Agreement and Privacy Policy. Factors to be considered for motor selection, Modern surveying instruments - Assignment, No public clipboards found for this slide, Student at Government College of Engineering, Kalahandi. 4. Errors in Chain Surveying – Types and Causes. And when the length of the chain is short, then the measured distance is long. Time to time checking of the chain helps to provide adequat… 18. Instrumental Errors. The chain survey is preferred when the ground is nearly flat and open and also when the area to be surveyed is smaller. Gross Error Surveying and Levelling. Surveying 1. Parallax error (incorrectly sighting the measurement). See our Privacy Policy and User Agreement for details. A classical example is the change in length of a tape as the temperature changes. 1. Prismatic Compass 6. Surveying and Levelling. It is the exercise of physically measuring horizontal distances. 3. The chain survey is the simplest method of surveying. A traverse must start with control station which is known station (known coordinate). For students studying the concept of Chain Surveying, study of the occurrence of different types of Errors in Chain Surveying is important. These errors have got a serious effect on the accuracy of the survey work. Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). You may need some measurements on the details (on the building sides…). chaining, Ranging, Chaining on uneven slopping ground, Errors in Chaining, Corrections. Booking Method. [PDF] Leave a comment. (vii) Sag in the chain, if suspended for measuring horizontal distance on a sloping ground. Surveying-I 2. Compensating errors are those which tend to become positive sometimes and negative at other time. no angular measurements are made. If you continue browsing the site, you agree to the use of cookies on this website. If the chain that is employed for measuring length is not equal to the true length, then the length measured won’t be correct. 2. The errors in chaining are regarded as +ve or -ve according as they make the result too great or too small. surveying, the following strategies must be followed: Follow techniques that will help detect and eliminatealltheblunders. Errors (iii), (iv) and (v) may be +ve or –ve. Prism Square 5. Sign In. Apr 07, 2018. This is the error due to the wrong length of the chain which is considered as one of the serious error. Systematic errors are constant under constant measuring conditions and change as conditions change. We will now move on with different numerical problems on the concept of Errors in Chain Surveying. If you continue browsing the site, you agree to the use of cookies on this website. chaining, Ranging, Chaining on uneven slopping ground, Errors in Chaining, Corrections. 4.9 Errors in chain surveying- causes & remedies, Precautions during chain surveying. Instrumental Errors; Collimation Error; Error due to Curvature & Refraction; Other Errors; Also See: Levelling Tools and Equipment. Errors in staff graduation Direct method of linear measurements (horizontal distance measurement). Chain survey is the simplest method of surveying. In this free video lecture, Prem Sir has solved some more numerical on Errors in Chain Surveying in Hindi. CHAPTER 3: TRAVERSE SURVEYING LECTURE CONTENT • INTRODUCTION TO TRAVERSE SURVEYING • TRAVERSING PROCEDURE • BOOKING • DATA PROCESSING • PLOTTING • ERRORS IN TRAVERSING INTRODUCTION TO TRAVERSE SURVEYING • Traversing is a method of control survey to establish control points. [PDF] What is Digital Elevation Model? Parallax error (incorrectly sighting the measurement).1. At the center of the chain is provide… A traverse must start with control station which is known station (known coordinate). The measurement type can be divided as, direct measurement method, optical … Technical Terms Used in chain Surveying Survey Stations These are important point fixed on ground indicating the starting point and the end point of the survey line. In this free video lecture, Prem Sir has solved some numerical on Errors in Chain Surveying in Hindi. VIP members get additional benefits. 3 Ranging Rods 3. Clipping is a handy way to collect important slides you want to go back to later. Instrumental error and Correction. Aug 30, 2017. Under the course of Practical Surveying. Systematic Errors Systematic errors, or biases errors, result from the physical properties of the measuring system. 1. This is lecture 7 of Surveying in Hindi. Errors in the distance measurement can arise from a number of sources: 1. TERMS RELATED WITH CHAIN SURVEYING 8. Site Setting Out Survey | Field Setting Out | Surveying Layout. 29:59. See Note 4. Errors can be cumulative or compensating. Looks like you’ve clipped this slide to already. They arise as a result of not being perfect in the use of the equipment or in the whole survey process. Draw the longest line according to its bearing. Presentation on : Chain surveying Determining the direction of any line in the field with respect to magnetic north "bearing". In this method the lengths of lines marked on the field are measured, while the details are measured by offsets and ties from these lines. Linear measurement In engineering survey, the linear horizontal distance is to be measured to complete a survey. Draw the check lines, and if there are any errors, check the drawn lines in the incorrect triangles. 6. Calibration error (if the scale is not accurately drawn).2. 2Engr.Shams Ul Islam (shams@cecos.edu.pk) 3. Welcome To Presentation 3. Now customize the name of a clipboard to store your clips. 7. For example, if the pull exerted on the tape in either more than or less than what should be the case, faulty results be gotten. lab #3: survey of an area by chain survey (closed traverse) 8 lab #4: chaining across obstacles 10 lab #5: chain surveying (mapping by tape) 15 lab #6: study of level and levelling staff 18 lab #7: differential or fly levelling – reduce levels by h.i method 22 lab # 8: differential or fly … 2. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Plane Surveying 2. 3. ... Chain Survey Steps - Method for Performing Chain Surveying. There are two types of Errors that are commonly seen to occur in Chain Surveying. A classical example is the change in length of a tape as the temperature changes. Error in chain surveying. There are various sources of errors in chain surveying. These errors have got a serious effect on the accuracy of the survey work. Cumulative errors are those tens in addition as the measurement continues. Login to The Constructor to ask questions, answer people’s questions, write articles & connect with other people. Hence the error is positive. In addition to survey errors and constraints, there are several survey effects for which there are no error-free solutions; the size of these effects can be studied even though they cannot be eliminated. These errors do not affect the survey work seriously. A chain that is very long, gives a distance that is lesser in value. 5. the following errors in chaining should be avoided. 4. Cancel reply. Eliminate or correct all systematic errors by frequent calibration and adjustment of the instruments Minimize the random errors by using good instrumentsandfieldprocedures. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. King Saud UniversityCollege of EngineeringCivil Engineering DepartmentSE 211 CHAIN SURVEYINGSUMMARY & ABSTRACT:Chain (Tape) surveying is the simplest form of detail surveying. And determine if this chain is the error i… error in chain Surveying | Surveying in Hindi 5... One direction only and go on cumulating improve functionality and performance, and provide. A distance that is lesser in value end of the human senses of sight, touch and hearing thelengths! Commonly seen to occur in one direction only and go on cumulating on this website on offsets ties... The incorrect triangles Sir has solved some more numerical on errors in Surveying. 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