What is chain surveying principles, procedure, method, instrument. Principles of chain surveying or linear surveying civil. Chain survey method for performing chain surveying how to. Chain surveying method in civil engineering, how to. So, this fieldwork aimed to train the student on the following process. Measuring distances along lines that run through obstacles. The necessary requirements for field work are chain, tape, ranging rod, arrows and. Surveying field books, engineering field books, mining field. Surveying maths a lesson 5 drawing a field book entry. Touhid ahamed faculty iubat chain surveying definition chain survey is the. The length of the chain, of course, depends upon the steepness of the sloping surface. Chain surveying is the type of surveying in which only linear measurements are made in the field.
Chain and compass surveying field work civil engineering. Apart from recording linear measurements in this survey the bearings taken also should be recorded. Surveying1 syllabus diploma in civil engineering, regulation 2010 to provide the students with an opportunity to acquire knowledge and skills about. The distance ap and bp are measured and noted in the field book. Chain surveying requires chain, tape and ranging rods.
The main principle of chain surveying or chain triangulation is to provide a framework consist of number of wellconditioned triangles or nearly equilateral triangles. It is the method of land surveying in which only linear measurements are made. Aug 26, 2017 in this method, a portion of the chain, 15 ft to 30 ft is generally used. Oct 09, 2010 before chain survey is carried out area to be surveyed is inspected carefully to ascertain any difficulty encountered during actual survey work, this inspection is called recii. The main requirements of the field book are that it should contain good quality stout opaque paper. The field book is an oblong book with a hinge at the narrow edge, and the chain is represented in it by one or two red lines or blue lines ruled down centrally along the length of each page. Chain surveying notes the author is a lecturer at kabale. An assistant holds the end of the tape on the object. Keeping the field bookobstacles in chain linesdetermination of areas example of calculation. Tallies are provided at every 2m of the chain for quick reading. Each chain line is represented by double line drawn through the corner of the page.
Usually, you will be able to reach all the points of the straight line you want to measure. Measure the change and offset and enter in the field book. Surveyors help in providing unique contours on the surface of the earth which will let the engineers to make maps and construction projects. Chain surveying or linear surveying surveying and levelling. Apr 28, 2020 selection of survey stations chain surveying, surveying and levelling agricultural engineering notes edurev is made by best teachers of agricultural. To survey an open field by chain survey in order to calculate the area of the open field. The size of the field book is 20 cm x 12 cm and it opens lengthwise. Types of obstacles in chain surveying and and solutions. In this video we cover how a surveyor draws a field book entry so we can understand it when we see one and be able. If carefully done, it gives quite accurate results. Field book is an oblong book hinged at the narrow edge having a chain represented in it either by one or two red or blue lines ruled down the centre of the length of each page. In chain survey, only measurements are taken in the field, and the rest work, such as plotting calculation etc. The chain is held horizontally with zero ends of it at p on the ground, while the point q1 vertically below the other end of the chain at q is found by means of a droparrow.
Recording the measurements in the field book field. Chain surveying in the field procedure of chain surveying. The perpendicular distance, called offsets, of various objects in the field. Chain surveying definition, details, procedure civil. It should be attached to the starting page of the field book. Oct 30, 2011 chain surveying or linear surveying surveying and levelling. There are three stages you have to go through while doing chain surveying these are.
Chain surveying is considered to be the simplest method of surveying in which measurements are taken in the field and other supplementary works like. In this video we cover how a surveyor draws a field. The booking or recording of the field work is commenced from the bottom of the first page. Conduct the survey work with chain, compass and plane table. The formation of wellconditioned triangles becomes difficult due to obstacles.
Types of chains used in surveying, their parts, testing and. A doubleline field book is similar to its singleline counterpart, except it has a red line in the center, as well as two blue or red lines that are about 1. Before chain survey is carried out area to be surveyed is inspected carefully to ascertain any difficulty encountered during actual survey work, this inspection is called recii. Pugh j c 1975, surveying for field scientists, methuen, 230pp, isbn 0416075304 genovese i 2005, definitions of surveying and associated terms, acsm, 314pp, isbn 0976599104. What are the obstacles in chain survey and methods to correct. Various types of obstacles we need to overcome in the process of measuring distance between two points. This is most suitably adapted to small plane areas with very few details.
Selection of survey stations chain surveying, surveying. What are the obstacles in chain survey and methods to. Apart from recording linear measurements in this survey the bearings taken. Field work in chain surveying surveying and levelling. It measures a series of straight lines on the ground with a chain or tape measure and all fixed points relative to the line of traverse either by right angles offsets or tie lines. Draw the check lines, and if there are any errors, check the drawn lines in the incorrect triangles. Chain tape surveying is the simplest form of detail surveying.
Principle of chain surveying, surveying and levelling. Demonstration of chain surveying related to field work and office work. Selection of the station, measurement of lines and taking offsets of different objects in the field reconnaissance. What are roles and works of surveyor in construction. Principle of chain surveying, surveying and levelling agricultural engineering notes edurev notes for agricultural engineering is made by best teachers who have written some of the best books of agricultural engineering. The elements of surveying and geodesy survivor library. Surveying is an art of determining the relative positions of. Surveying maths a lesson 5 drawing a field book entry youtube. Ppt chain surveying powerpoint presentation free to.
Surveying is an art of determining the relative positions of various points on, above or below the surface of the earth by means of direct or indirect measurement of distance, direction and elevation. These types of chains comes in many lengths such as 5, 10, 20 and 30 meters. In chain surveying the sides of the triangles are measured directly on the field by chain or tape, and no angular measurements are taken. Surveying1 syllabus civil engineering, regulation 2010. Land surveying may be considered the earliest practical application of the art of geometry or earth measurement, and must have been in some more or lees rude form coeval with agriculture and the division or appropriation of the soil. Chain surveying is not suitable for large areas having many details. In this method, the lengths of lines marked on the field are measured, while the details are measured by offsets and ties from. It is an oblong book of size about 20 cm x 12 cm and opens lengthwise. This procedure varies with the experiment given to students. Jul 20, 2018 suppose ab is a chain line and p is the corner of a building. Public land survey system foundation 2009 manual of surveying instructions for the survey of the public lands of the united states. Recording chain and compass measurements the type of field book used in chain survey is used in this survey also.
Aug 03, 2018 chain surveying in the field procedure of chain surveying. Rotate the compass until it is directed to the pole and read the angle. Well conditioned triangles angles 30 120 44 choice of chain lines. This is the preliminary survey in which to the survey party will examine the plot to be surveyed in order to know as to how the works can be executed in the best possible. Viewer has to keep in mind that this video only shows the basics of chain surveying observation in field, it also. Types of chains used in surveying, their parts, testing. In this survey only measurements are taken in the field, and the rest work, such as plotting calculation. Chain survey procedure, applicability, survey stations and their. Procedure for surveying the given open field closed traverse. Field book is an oblong book hinged at the narrow edge having a chain represented in it either by one or two red or blue lines ruled. Selection of a framework chain or baselines and control points. In this method the lengths of lines marked on the field are measured, while the. The field book is an oblong book with a hinge at the narrow edge, and the chain is represented in it by one or two red lines or blue lines ruled. Chain surveying method in civil engineering, how to perform.
As the measurement proceeds, offsets are taken on both sides of the line ab and recorded in the field book. The notebook in which field measurements are noted is known as the field book. The surveyor is the person who is supposed to make precise measurement that will identify the boundary. Sep 09, 2016 demonstration of chain surveying related to field work and office work. Surveyor swings the tape on chain line and selects the point on the chain where. Obstacles to ranging and chaining should be avoided. Metric chains are the most commonly used chain in india. The chain remains on the ground while the offset and the booking parties do their work booking is the process of entering measurement in the field book, rule and pencil or notebook by using ordinally exercise book start from the bottom of the page and as you go around the chain line, you walk upward after which the leader take his hand to the.
Surveyor swings the tape on chain line and selects the point on the chain where offset distance is the least fig. Surveying or land surveying is the technique, profession, art and science of determining the terrestrial or threedimensional positions of points and the distances and angles between. In this method thelengths of lines marked on the field are measured, while the details are measured byoffsets and ties from these lines. Chain surveying is a type of survey in which the surveyor takes measurements in the field and then completes plot calculations and other processes in the office. Earlier, we discussed principles of chain surveying and the considerations that are taken for carrying out chain surveying in this article, we will discuss various instruments that are essential for carrying out chain surveying. The chain remains on the ground while the offset and the booking parties do their work booking is the process of entering measurement in the field book, rule and pencil or notebook by using. The procedure of chain surveying is very simple and straightforward. Sep 04, 2016 chain survey chain survey is the simplest method of surveying. Earlier, we discussed principles of chain surveying and the considerations that are taken for carrying out chain surveying in this. There are two forms of the book i single line and ii double line. The book in which the chain or tape measurements are entered is called the field book. Baseline equipment company 215 cap ct, ste a eugene, or 97402 877 8443101 fax. Landsurveying may be considered the earliest practical application of the art of geometry or. Singleline field book in this type of field book, a single red line is drawn through the middle of.
In this method, a portion of the chain, 15 ft to 30 ft is generally used. In this survey only measurements are taken in the field, and the rest work, such as plotting calculation etc. Build up the other chain lines by using beam compasses. The chain should be properly stretched so that there is no sag in it. What is chain surveying principles, procedure, method. This means that the area to be surveyed is divided. This is most suitable adapted to small plane areas with very few details. Bookingthe field book should be neat and consistent. These spaces represent the chain line and are meant to record any changes that need to be kept separate. Because the perpendicular is the shortest distance. A b 180 electric pole 168 tree 142 120 85 10 27 40 line da linega fence 5 12 20 30 35 t1 line t1 t2 tie linebc. In chain surveying the sides of the triangles are measured directly on the field by. Jun 03, 2017 in this series of videos, we will teach you the basic maths used by a surveyor. Suppose ab is a chain line and p is the corner of a building.
Viewer has to keep in mind that this video only shows the. All observations and measurements taken during chain surveying are to be recorded in a standard field book. Chain survey chain survey is the simplest method of surveying. Surveying line, triangle, ground, offsets, chain, laid. From these records in the field book, the whole area can be plotted on a. During this inspection surveyor ensure solution of such difficulties, these difficulties are termed as obstacles, to be more precise there are two types of obstacles a. In this series of videos, we will teach you the basic maths used by a surveyor. Field work in chain survey surveying in civil engineering. Jun 16, 2015 chain surveying, it is a method of surveying in which no angles are measured but only linear measurement is taken in the field by using a chain or tape measure. Field book all observations and measurements taken during chain surveying are to be recorded in a standard field book. Surveying field books, engineering field books, mining. May 23, 2019 chain survey is the simplest method of surveying. Compass surveying principles use of prismatic compass, measurement of. Types of obstacles in chain surveying linkedin slideshare.
The surveyors have to measure the distance and the angles. 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. Keeping the zero end of the tape at p and swinging the tape along the chain line the point of minimum tape length on the chain line is noted which should be the foot of the perpendicular. Chain surveying is the simplest method of surveying. May 03, 2020 principle of chain surveying, surveying and levelling agricultural engineering notes edurev is made by best teachers of agricultural engineering. Chain surveying, it is a method of surveying in which no angles are measured but only linear measurement is taken in the field by using a chain or tape measure.
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