Surveying I Introduction Department of Civil Engineering, 2009 3 Chapter 1 Introduction 1.1. Linear measurement, in any practical range, can be made speedily and accurately due to the development of these instruments. These methods are total station (TS), Global positioning system (GPS), and terrestrial laser scaner (TLS). It is an integral part of Civil Engineering Discipline. The relative positions of points are located by means of measuring distances, directions ... EDM… 2 • Surveying has to do with the determination of the relative spatial location of points on or near the surface of the earth. 1. A traverse is a series of connected survey lines of known lengths and directions. ELECTROMAGNETIC DISTANCE MEASUREMENT (EDM) Definition The electronic distance measurement instrument (EDM) is a relatively new development in the field of surveying. ; An entire station is a combination of a digital theodolite, an electronic distance measuring device (EDM) and a microprocessor with a memory unit. This is one of the important subjects of civil engineering. Total Station EDM Corrections for Systematic Errors 6 The EDM (Electronic Distance Measurement) part of a total station measures distances using light waves. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 99 pages. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Download Free … Survey The digital flow Communication Calculation Traverse Net adjustment Mapping, CAD ArcGIS Plans & drawings Design Stake out. Can achieve an accuracy of +/- (1 mm + 1 ppm) to +/- (10 mm + 5 ppm). distance. See our User Agreement and Privacy Policy. Question asked in GTU‐Theory 1) Descesc beribe ttehe ppoceduerocedure of settsett ging out of sspeimple circular curve by (i) Perpendicular offset from tangent, and (ii) Rankine’s method of tangential ( B.E Civil , M.E Structure). Chapter 3_EDM Calibration.ppt. Highly compressed flyashbased papercrete brick, Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). The method commonly used in most of engineering projects is that of traversing. These points may be any physical thing: a highway, culvert, ditch, storm drain inlet, or property corner. 41 pages. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Now customize the name of a clipboard to store your clips. Section Measured Distance Temperature (C°) A-1 30.000 14 1-2 30.000 15 2-B 21.151 16 [Solution next page] 15 Example 6.1 Solution FUNDAMENTALS OF SURVEYING 16 COMBINED CORRECTIONS IN TAPING Example 6.2 A 100 ft tape standardized at 68oF and supported throughout under a tension of 20 lb was found to be 100.012 ft long. You can change your ad preferences anytime. Title: Surveying Equipment 1 Surveying Equipment 2 Measuring Distance. It then calculates distance as a function of the elapsed time. The PowerPoint PPT presentation: "Chain Surveying" is the property of its rightful owner. Land Surveying Chapter 4 EDM and Theodolite - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. Demarcation of the plot & marking the actual boundaries. Because only a surveyor who has full understanding of surveying techniques will be able to determine the most efficient methods required to obtain optimal results over a wide variety of surveying problems. Looks like you’ve clipped this slide to already. The instrument sends out a beam of light or high frequency microwaves from one end of line to be measured, and directs it towards the far end of the line. Here the distance is measured with the help of electro-magnetic waves such as micro wave, infra red wave and other similar waves. These electronic tachometers can read and record horizontal and vertical angles together with slope distances. Caspary, J.M. A traverse is a series of connected survey lines of known lengths and directions. of three surveying methods. EDM ( Electronic distance meter),applications,advance survey instrument. zOne of the fundamentals of surveying is the need to measure distance. Distance Measurement by Electronic method CHAPTER 1: INTRODUCTION CADASTRAL SURVEY BY : Sr AHMAD NORHISYAM IDRIS (MRISM) Centre of ... Chapter 3_EDM Calibration.ppt. Distances and directions determine the horizontal positions of these points. Without taking a survey of the plot where the construction is to be carried out, the work cannot begin 2 Distances are not necessarily linear, especially if they occur on ... (EDM, Stadia, subtense bar) zErrors and Corrections for Tape Measurement zEDM ... 2Chapter 2 Linear Distance Measurement.ppt ... Combines theodolite, EDM, data logger & surveying software ... EDM instruments are combined with digital theodolites and microprocessors to produce total station instruments. 6.Traverse Surveying Introduction The methods of establishing control points in surveying are; triangulation, trilateration, intersection, Satellite position fixing, and traversing. EDM is a surveying instrument for measuring distance electronically between two points through electromagnetic waves. function of theodolite & EDM – TOTAL STATION). 8.11 EDM without Reflecting Prisms (Reflector Less Measurements) 8.12 Focussing and Sighting. This Surveying Instrument is used in triangulation to measure the length of Base line because more accuracy is required to measure the length of base line. EDM CharacteristicsEDM Characteristics  750-1000 meters range  Accurate to ±5mm + 5 ppm  Operating temperature between -20 to +50 degrees centigrade  1.5 seconds typical for computing a distanc, 1 second when tracking. Teodolite can give bearing and angle only. If the operator enters air temperature and pressure, the systematic error CHAPTER 1 ppt- Introduction to Cadastral Surveying.ppt; MARA University of Technology; AP 220 - Summer 2020. conversant with the survey methods that will achieve the standards of accuracy set out above. Department of Survey and Mapping. • Input and output. 2 • Surveying has to do with the determination of the relative spatial location of points on or near the surface of the earth. Typical short-range EDMs can be used to measure distances as great as 5 kilometers at accuracies up to one part in 20,000, twice as accurate as taping. REFERENCES • Engineering And Design Structural Deformation SiSurvey ing US A C f E iUS Army Corps of Engineers EM 1110EM 1110 -2-1009 • W F Caspary J M Rüeger Concepts of Network andW.F. The most frequently used surveying instrument today is the total station (As per below figure No1). Just download PPTX and open the theme in Google Slides. DIGISMART - Document Management System, Scanning & Digitization Services - DigiSmart is a feature-rich scanning and digital data archiving application incorporating an ultra-intuitive user Interface that gives users the benefits of what they love best about the paper world while harnessing the power and sophistication they depend upon within the electronic realm. Surveying finds multiple industrial applications across various domains. Distances are not necessarily linear, especially if they occur on the spherical earth. 6. Types of Measurements in Surveying: Surveying is the art of making suitable measurements in horizontal or vertical planes. Now customize the name of a clipboard to store your clips. (EDM) or laser-ranging equipment is employed for cavity measurement. • It is the art of measuring horizontal and vertical distances between objects, of measuring angles between lines, of determining the direction of lines, and of establishing points by predetermined angular and linear measurements. Electronic Distance Mr. Momin Umarfarook H. I will send them out to make a survey of the land and to write a description of it, according to the inheritance of each. Surveying manual Surveying is the science of determining the relative positions of objects or points on the earth’s surface. 8.1 Introduction. EDM stands for Electronic Distance Measurement. Definition Surveying is the art of measuring distances, angles, and positions above, on or below the earth’s surface. Chapter 3_EDM Calibration.ppt; MARA University of Technology; AP 220 - Summer 2020. Temporary Bench Mark (TBM) • A moveable object that has a known height above a pre-defined level. Drones for surveying EDM Total Station Ordinary GPS DGPS Drone . Then they will return to me.” Modern Surveying Instruments Electronic Distance Measurement (EDM) Instruments: Direct measurement of distances and their directions can be obtained by using electronic instruments that rely on propagation, reflection and reception of either light waves or radio waves. 2. The velocity of light in air varies according to the air density. EDM is commonly carried out with digital instruments called theodolites. Surveying Procedure. This level is not absolute and is defined locally by the surveyors for the purpose of the survey. Surveying is the art of measuring distances, anglesand ... using fiberglass, steel tape or EDM (electronic distance measuring) + difference in elevation and slope distance. EDM: General: 1 : 5000. to 1:50000: Engineering survey such as setting out and site traverse. 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