The theodolite is an instrument used to measure horizontal and vertical angles that is more precise than a magnetic compass. It can measure angles to an accuracy of 10-20 seconds whereas a compass is only accurate to 30 minutes. The theodolite is used to measure horizontal and vertical angles when objects are at a distance or elevation where more precise measurements are needed. The method of surveying that uses a theodolite to measure angles is called theodolite surveying. The theodolite can be used to measure angles, bearings, distances, elevations, set out curves, and for mapping and construction applications.
Surveying ppt : COMPONENETS OF TRANSIT THEODOLITESukhvinder Singh
The document describes the main components of a transit theodolite. It lists 12 key components: 1) trivet, 2) foot screws, 3) tri branch, 4) leveling head, 5) spindles, 6) lower plate, 7) upper plate, 8) A frame, 9) T frame, 10) altitude bubble, 11) compass, and 12) tripod. The lower plate measures horizontal angles with graduations from 0 to 360 degrees. The upper plate has two verniers used to read fractions of degrees on the lower plate. The tripod supports the theodolite during field use.
The document provides information about theodolites. It begins with an introduction stating that a theodolite is used to measure horizontal and vertical angles more precisely than a magnetic compass. It then discusses the main parts of a theodolite including the horizontal circle, vertical circle, telescope, and levels. The document also covers the history of theodolites from their early origins to modern electronic versions. It describes how to operate a transit vernier theodolite including terms like centering, transiting, swinging the telescope, and changing face. Finally, it discusses the permanent and temporary adjustments needed to ensure accurate theodolite measurements.
This document describes three methods for measuring horizontal angles with a theodolite:
1) Ordinary Method: A horizontal angle is measured between points A and B by sighting each point and recording the vernier readings. The process is repeated by changing instrument faces and the average of readings gives the angle.
2) Repetition Method: A more accurate method where the angle is mechanically added several times by repeatedly sighting point A after sighting B.
3) Reiteration Method: Several angles are measured successively at a station, closing the horizon by resighting the initial point. Any error is distributed among the measured angles.
This document provides information about tacheometry, which is a method of surveying that determines horizontal and vertical distances from instrumental observations. It discusses how tacheometry can be used when obstacles make traditional surveying difficult. The key aspects covered include:
- Defining tacheometry and the measurements it provides
- When tacheometry is advantageous over other surveying methods
- The instruments used, including tacheometers and levelling rods
- How horizontal and vertical distances are calculated using constants
- The different types of tacheometer diaphragms and telescopes
- The fixed hair method for taking readings
1. The document discusses advanced surveying equipment that provide more precise and faster surveying compared to traditional methods. It describes the Electronic Distance Meter (EDM), microoptic theodolite, electronic/digital theodolite, and total station.
2. An EDM measures distance using the phase difference between a transmitted and reflected wave. A microoptic theodolite and electronic theodolite are used to measure angles precisely.
3. A total station integrates EDM and theodolite functions to allow simultaneous distance and angle measurements for surveying tasks such as setting out buildings, contour mapping, and more.
The document provides information about lectures on surveying topics including:
- Classification of theodolites as transit, non-transit, vernier, and micrometer theodolites.
- Uses of theodolites for measuring horizontal and vertical angles, locating points, and other surveying tasks.
- Terms used in manipulating a transit vernier theodolite such as centering, transiting, swinging the telescope, and changing face.
- Bearings and the rules for converting whole circle bearings to quadrantal/reduced bearings.
- Definitions of open and closed traverses and the formula to check the interior angles of a closed traverse.
- An example problem on calculating
The theodolite is an instrument used to measure horizontal and vertical angles that is more precise than a magnetic compass. It can measure angles to an accuracy of 10-20 seconds whereas a compass is only accurate to 30 minutes. The theodolite is used to measure horizontal and vertical angles when objects are at a distance or elevation where more precise measurements are needed. The method of surveying that uses a theodolite to measure angles is called theodolite surveying. The theodolite can be used to measure angles, bearings, distances, elevations, set out curves, and for mapping and construction applications.
Surveying ppt : COMPONENETS OF TRANSIT THEODOLITESukhvinder Singh
The document describes the main components of a transit theodolite. It lists 12 key components: 1) trivet, 2) foot screws, 3) tri branch, 4) leveling head, 5) spindles, 6) lower plate, 7) upper plate, 8) A frame, 9) T frame, 10) altitude bubble, 11) compass, and 12) tripod. The lower plate measures horizontal angles with graduations from 0 to 360 degrees. The upper plate has two verniers used to read fractions of degrees on the lower plate. The tripod supports the theodolite during field use.
The document provides information about theodolites. It begins with an introduction stating that a theodolite is used to measure horizontal and vertical angles more precisely than a magnetic compass. It then discusses the main parts of a theodolite including the horizontal circle, vertical circle, telescope, and levels. The document also covers the history of theodolites from their early origins to modern electronic versions. It describes how to operate a transit vernier theodolite including terms like centering, transiting, swinging the telescope, and changing face. Finally, it discusses the permanent and temporary adjustments needed to ensure accurate theodolite measurements.
This document describes three methods for measuring horizontal angles with a theodolite:
1) Ordinary Method: A horizontal angle is measured between points A and B by sighting each point and recording the vernier readings. The process is repeated by changing instrument faces and the average of readings gives the angle.
2) Repetition Method: A more accurate method where the angle is mechanically added several times by repeatedly sighting point A after sighting B.
3) Reiteration Method: Several angles are measured successively at a station, closing the horizon by resighting the initial point. Any error is distributed among the measured angles.
This document provides information about tacheometry, which is a method of surveying that determines horizontal and vertical distances from instrumental observations. It discusses how tacheometry can be used when obstacles make traditional surveying difficult. The key aspects covered include:
- Defining tacheometry and the measurements it provides
- When tacheometry is advantageous over other surveying methods
- The instruments used, including tacheometers and levelling rods
- How horizontal and vertical distances are calculated using constants
- The different types of tacheometer diaphragms and telescopes
- The fixed hair method for taking readings
1. The document discusses advanced surveying equipment that provide more precise and faster surveying compared to traditional methods. It describes the Electronic Distance Meter (EDM), microoptic theodolite, electronic/digital theodolite, and total station.
2. An EDM measures distance using the phase difference between a transmitted and reflected wave. A microoptic theodolite and electronic theodolite are used to measure angles precisely.
3. A total station integrates EDM and theodolite functions to allow simultaneous distance and angle measurements for surveying tasks such as setting out buildings, contour mapping, and more.
The document provides information about lectures on surveying topics including:
- Classification of theodolites as transit, non-transit, vernier, and micrometer theodolites.
- Uses of theodolites for measuring horizontal and vertical angles, locating points, and other surveying tasks.
- Terms used in manipulating a transit vernier theodolite such as centering, transiting, swinging the telescope, and changing face.
- Bearings and the rules for converting whole circle bearings to quadrantal/reduced bearings.
- Definitions of open and closed traverses and the formula to check the interior angles of a closed traverse.
- An example problem on calculating
This document discusses the use of a theodolite for surveying. It begins by explaining that a theodolite is needed to precisely measure horizontal and vertical angles, unlike a compass. It then defines theodolite surveying as surveying that measures angles using a theodolite. The document goes on to classify theodolites based on their horizontal axis and method of angle measurement. It describes the basic parts of a transit vernier theodolite and explains terms used in manipulating one. Finally, it discusses methods for measuring horizontal angles, including the general, repetition, and reiteration methods.
1) Levelling is the process of determining the relative elevations of points on or near the earth's surface. It is important for engineering projects to determine elevations along alignments.
2) Levelling is used to prepare contour maps, determine altitudes, and create longitudinal and cross sections needed for projects.
3) Key terms include bench mark, datum, reduced level, line of collimation, and height of instrument. Different types of levelling include simple, differential, fly, longitudinal, and cross-sectional levelling.
The document provides information about theodolite surveying including:
1. A theodolite is an instrument used to measure horizontal and vertical angles which can also be used to prolong lines, measure distances indirectly, and for leveling.
2. Theodolite traversing involves establishing control points by measuring angles and distances between traverse stations to calculate positions.
3. Components of a theodolite include a telescope that can rotate vertically and a compass to determine direction, along with accessories like a tripod, rods, and tapes used in surveying.
This document provides an overview of linear measurements and chain surveying techniques. It discusses different types of ranging methods, including direct and reciprocal ranging, to locate intermediate points along a survey line. It also describes instruments used for chain surveying, such as different types of chains, tapes, arrows, ranging rods, and plumb bobs. The key principle of chain surveying is that it involves measuring the sides of triangles within the survey area using a chain or tape, without taking any angular measurements.
Theodolite traversing, purpose and principles of theodolite traversingDolat Ram
The document discusses theodolite traversing, which is a surveying method that uses a theodolite to measure angles and a chain or tape to measure distances between control points called traverse stations.
The theodolite is used to measure horizontal and vertical angles, and there are two main types - optical and electronic digital theodolites. The chain or tape is used to measure distances between traverse stations.
A traverse consists of straight lines connecting traverse stations, with known lengths and angles defined by theodolite measurements. Traverses can be open or closed loops. Theodolite traversing is used for area computation, surveying, data reduction, and indirect measurement of elevations, distances, and
12.1. Horizontal and vertical control (1).pptxSaddoAjmal
This document provides an overview of engineering surveying topics including construction surveying, horizontal and vertical controls, and their application to various construction projects such as buildings, railroads, pipelines, and underground mining. It discusses the history of surveying, key elements and stages of construction surveying, and methods for establishing horizontal and vertical control networks to guide construction activities. Specific surveying techniques are described for setting out buildings, laying railroads, constructing pipelines, and surveying underground mines.
This document discusses various methods of linear measurement used in surveying. It describes chain and tape measurements, including different types of chains, steel bands, and tapes. It also discusses direct and indirect methods of ranging out survey lines when stations are visible or not visible to each other. Finally, it summarizes direct and indirect methods of chaining on sloping ground, including stepping, hypotenuse allowance, and applying slope corrections.
Surveying is an important part of Civil engineering. Various part like theodolite, plane table surveying, computation of area and volume are useful for all university examination and other competitive examination
Metric Chain : It Consists of galvanized mild steel wire of 4mm diameter known as link.
It is available in 20m, 30m, 50m length which consists of 100 links.
Gunter’s Chain : A 66 feet long chain consists of 100 links, each of 0.66 feet, it is known as Gunter’s chain.
This chain is suitable for taking length in miles.
Engineer’s Chain : A 100 feet long chain consisting of 100 links each of 1 feet is known as engineer’s chain.
This chain is used to measure length in feet and area in sq.yard.
Revenue Chain : it is 33 feet long chain consisting of 16 links.
This chain is used for distance measurements in feet & inches for smaller areas.
Chapter 6 area & volume measurement, Digital PlanimeterAbhay Abhale
This document discusses the components, uses, and measurement process of a digital planimeter. It describes the main components of a digital planimeter which include a roller, tracing arm, tracing magnifier, tracing point, and function keys. It then explains the various function keys and their purposes. Finally, it outlines the step-by-step process for measuring the area of a shape using a digital planimeter, which involves selecting a scale, marking a starting point, tracing the outline while holding the tracing point, and reading the area measurement from the display.
The document discusses the theodolite, an instrument used to measure horizontal and vertical angles. It has three main assemblies - the levelling head, horizontal circle, and telescope. The main parts include the horizontal and vertical circles, verniers, clamps and screws. It describes how to measure horizontal and vertical angles using the theodolite. Sources of error and methods to balance a traverse are also outlined.
Surveying presentation and its objectives in detail including principles,hist...amansingh2914
Surveying is the technique of determining positions and distances between points on the Earth's surface. Ancient surveyors used simple geometry and ropes to establish boundaries. Modern surveying began in the 18th century with more precise instruments like the theodolite and methods for measuring distance. In the 20th century, technologies like tellurometers and GPS satellites improved accuracy. Today, surveys combine traditional and modern tools like total stations, drones, and 3D scanning. Surveying techniques involve measuring angles and distances to map features and boundaries.
The document discusses theodolites, which are surveying instruments used to precisely measure horizontal and vertical angles. Theodolites have three leveling screws and an optical plummet or prism, and can be used to establish straight and curved lines, measure distances, and establish elevations. Modern electronic theodolites have digital readouts and can measure angles more precisely than older optical theodolites. The document also describes how to set up a theodolite and take angle measurements, as well as techniques for prolonging measurement lines past obstacles using triangulation or offsets.
Tacheometric surveying is a method of rapidly determining horizontal and vertical positions of points using optical measurements rather than traditional tape or chain measurements. A tacheometer, which is a transit theodolite fitted with a stadia diaphragm, is used to measure the horizontal and vertical angles to a stadia rod or staff held at survey points. Formulas involving the stadia interval, staff intercept readings, and calculated constants are used to determine horizontal distances and elevations from the instrument to points. Measurements can be taken with horizontal lines of sight or inclined lines of sight when the staff is held vertically or normal to the line of sight.
Introduction to surveying, ranging and chainingShital Navghare
This presentation contains the complete introduction of surveying. It also includes all the instrucments used in linear measurement and the terms related to Ranging and Chaining
This document provides instructions for using a digital theodolite to take horizontal and vertical angle measurements of reference points by following several steps:
1) Setting up the tripod and centering the theodolite over a reference mark.
2) Leveling the theodolite using circular and plate levels to precisely align it.
3) Taking multiple rounds of horizontal and vertical angle measurements in both face-left and face-right positions to reference points, and calculating the mean values.
4) Packing up the theodolite by reversing the setup steps.
This document provides information about the theodolite including its main parts, how to measure horizontal and vertical angles, methods for traversing, and how to compute latitudes and departures. It discusses sources of errors in theodolite measurements and how to balance a traverse using Bowditch's rule. It also includes an example problem to calculate latitudes, departures, and closing error for a given traverse and adjust it.
The document discusses theodolite traversing and defines key terms related to using a transit theodolite. It describes the main components of a transit theodolite including the telescope, vertical circle, plate bubbles, tribrach, and foot screws. It explains how to perform temporary adjustments like centering the theodolite over a station mark and leveling it using the tripod and foot screws. It also provides details on measuring horizontal and vertical angles with a vernier theodolite.
This document discusses the use of a theodolite for surveying. It begins by explaining that a theodolite is needed to precisely measure horizontal and vertical angles, unlike a compass. It then defines theodolite surveying as surveying that measures angles using a theodolite. The document goes on to classify theodolites based on their horizontal axis and method of angle measurement. It describes the basic parts of a transit vernier theodolite and explains terms used in manipulating one. Finally, it discusses methods for measuring horizontal angles, including the general, repetition, and reiteration methods.
1) Levelling is the process of determining the relative elevations of points on or near the earth's surface. It is important for engineering projects to determine elevations along alignments.
2) Levelling is used to prepare contour maps, determine altitudes, and create longitudinal and cross sections needed for projects.
3) Key terms include bench mark, datum, reduced level, line of collimation, and height of instrument. Different types of levelling include simple, differential, fly, longitudinal, and cross-sectional levelling.
The document provides information about theodolite surveying including:
1. A theodolite is an instrument used to measure horizontal and vertical angles which can also be used to prolong lines, measure distances indirectly, and for leveling.
2. Theodolite traversing involves establishing control points by measuring angles and distances between traverse stations to calculate positions.
3. Components of a theodolite include a telescope that can rotate vertically and a compass to determine direction, along with accessories like a tripod, rods, and tapes used in surveying.
This document provides an overview of linear measurements and chain surveying techniques. It discusses different types of ranging methods, including direct and reciprocal ranging, to locate intermediate points along a survey line. It also describes instruments used for chain surveying, such as different types of chains, tapes, arrows, ranging rods, and plumb bobs. The key principle of chain surveying is that it involves measuring the sides of triangles within the survey area using a chain or tape, without taking any angular measurements.
Theodolite traversing, purpose and principles of theodolite traversingDolat Ram
The document discusses theodolite traversing, which is a surveying method that uses a theodolite to measure angles and a chain or tape to measure distances between control points called traverse stations.
The theodolite is used to measure horizontal and vertical angles, and there are two main types - optical and electronic digital theodolites. The chain or tape is used to measure distances between traverse stations.
A traverse consists of straight lines connecting traverse stations, with known lengths and angles defined by theodolite measurements. Traverses can be open or closed loops. Theodolite traversing is used for area computation, surveying, data reduction, and indirect measurement of elevations, distances, and
12.1. Horizontal and vertical control (1).pptxSaddoAjmal
This document provides an overview of engineering surveying topics including construction surveying, horizontal and vertical controls, and their application to various construction projects such as buildings, railroads, pipelines, and underground mining. It discusses the history of surveying, key elements and stages of construction surveying, and methods for establishing horizontal and vertical control networks to guide construction activities. Specific surveying techniques are described for setting out buildings, laying railroads, constructing pipelines, and surveying underground mines.
This document discusses various methods of linear measurement used in surveying. It describes chain and tape measurements, including different types of chains, steel bands, and tapes. It also discusses direct and indirect methods of ranging out survey lines when stations are visible or not visible to each other. Finally, it summarizes direct and indirect methods of chaining on sloping ground, including stepping, hypotenuse allowance, and applying slope corrections.
Surveying is an important part of Civil engineering. Various part like theodolite, plane table surveying, computation of area and volume are useful for all university examination and other competitive examination
Metric Chain : It Consists of galvanized mild steel wire of 4mm diameter known as link.
It is available in 20m, 30m, 50m length which consists of 100 links.
Gunter’s Chain : A 66 feet long chain consists of 100 links, each of 0.66 feet, it is known as Gunter’s chain.
This chain is suitable for taking length in miles.
Engineer’s Chain : A 100 feet long chain consisting of 100 links each of 1 feet is known as engineer’s chain.
This chain is used to measure length in feet and area in sq.yard.
Revenue Chain : it is 33 feet long chain consisting of 16 links.
This chain is used for distance measurements in feet & inches for smaller areas.
Chapter 6 area & volume measurement, Digital PlanimeterAbhay Abhale
This document discusses the components, uses, and measurement process of a digital planimeter. It describes the main components of a digital planimeter which include a roller, tracing arm, tracing magnifier, tracing point, and function keys. It then explains the various function keys and their purposes. Finally, it outlines the step-by-step process for measuring the area of a shape using a digital planimeter, which involves selecting a scale, marking a starting point, tracing the outline while holding the tracing point, and reading the area measurement from the display.
The document discusses the theodolite, an instrument used to measure horizontal and vertical angles. It has three main assemblies - the levelling head, horizontal circle, and telescope. The main parts include the horizontal and vertical circles, verniers, clamps and screws. It describes how to measure horizontal and vertical angles using the theodolite. Sources of error and methods to balance a traverse are also outlined.
Surveying presentation and its objectives in detail including principles,hist...amansingh2914
Surveying is the technique of determining positions and distances between points on the Earth's surface. Ancient surveyors used simple geometry and ropes to establish boundaries. Modern surveying began in the 18th century with more precise instruments like the theodolite and methods for measuring distance. In the 20th century, technologies like tellurometers and GPS satellites improved accuracy. Today, surveys combine traditional and modern tools like total stations, drones, and 3D scanning. Surveying techniques involve measuring angles and distances to map features and boundaries.
The document discusses theodolites, which are surveying instruments used to precisely measure horizontal and vertical angles. Theodolites have three leveling screws and an optical plummet or prism, and can be used to establish straight and curved lines, measure distances, and establish elevations. Modern electronic theodolites have digital readouts and can measure angles more precisely than older optical theodolites. The document also describes how to set up a theodolite and take angle measurements, as well as techniques for prolonging measurement lines past obstacles using triangulation or offsets.
Tacheometric surveying is a method of rapidly determining horizontal and vertical positions of points using optical measurements rather than traditional tape or chain measurements. A tacheometer, which is a transit theodolite fitted with a stadia diaphragm, is used to measure the horizontal and vertical angles to a stadia rod or staff held at survey points. Formulas involving the stadia interval, staff intercept readings, and calculated constants are used to determine horizontal distances and elevations from the instrument to points. Measurements can be taken with horizontal lines of sight or inclined lines of sight when the staff is held vertically or normal to the line of sight.
Introduction to surveying, ranging and chainingShital Navghare
This presentation contains the complete introduction of surveying. It also includes all the instrucments used in linear measurement and the terms related to Ranging and Chaining
This document provides instructions for using a digital theodolite to take horizontal and vertical angle measurements of reference points by following several steps:
1) Setting up the tripod and centering the theodolite over a reference mark.
2) Leveling the theodolite using circular and plate levels to precisely align it.
3) Taking multiple rounds of horizontal and vertical angle measurements in both face-left and face-right positions to reference points, and calculating the mean values.
4) Packing up the theodolite by reversing the setup steps.
This document provides information about the theodolite including its main parts, how to measure horizontal and vertical angles, methods for traversing, and how to compute latitudes and departures. It discusses sources of errors in theodolite measurements and how to balance a traverse using Bowditch's rule. It also includes an example problem to calculate latitudes, departures, and closing error for a given traverse and adjust it.
The document discusses theodolite traversing and defines key terms related to using a transit theodolite. It describes the main components of a transit theodolite including the telescope, vertical circle, plate bubbles, tribrach, and foot screws. It explains how to perform temporary adjustments like centering the theodolite over a station mark and leveling it using the tripod and foot screws. It also provides details on measuring horizontal and vertical angles with a vernier theodolite.
This document discusses different types of levels used in surveying and engineering projects. It describes dumpy levels, tilting levels, automatic levels, and digital levels. Dumpy levels have a rigidly fixed telescope but are simple and stable. Tilting levels allow the telescope to be tilted for precise work. Automatic levels have a compensator to keep the line of sight horizontal. Digital levels determine heights and distances digitally with high accuracy up to 100 meters. Leveling is important for engineering projects to determine relative elevations of points.
Total station is a modern surveying instrument that combines an electronic theodolite and electronic distance meter. It allows the user to determine coordinates of points by measuring horizontal and vertical angles and slope distances to a reflector target simultaneously. The total station records measurements directly into its internal microprocessor, allowing precise data collection and processing without manual calculations. It has made surveying work faster, more accurate and less tedious compared to traditional instruments.
Surveying is used at various stages of a construction project from conceptual planning to maintenance. It involves measuring positions and elevations to determine spatial relationships and enable engineering design and construction. Common surveying methods include chain, compass, theodolite, plane table, tachometric, aerial photographic, and remote sensing surveys. Levelling specifically refers to determining relative elevations and is important for engineering works like establishing rail and road alignments and profiles. Key levelling instruments are dumpy level, tilting level, automatic level, and digital level.
Report Assignment 2 for Site Surveying module which requires us to do Traversing measurement around the campus carpark, for the Bachelor of Quantity Surveying (BQS) Course Semester 2, Taylor's University Lakeside Campus
The Uses of Prismatic Compass ComponentsAndi Rahman
The document describes the components and uses of a prismatic compass. It details the cylindrical metal box, pivot, lifting pin and lever, spring brake, magnetic needle, graduated circle, prism, object vane, eye vane, sunglasses, and reflecting mirror that make up the prismatic compass. It then explains that the prismatic compass is a small, handheld instrument used for observing and rough work, and that its prismatic attachment contains a 45 degree reflecting prism to magnify the graduations and allow the user to take readings.
1. The document discusses electronic distance measurement (EDM) using a total station to measure distances between two points. An EDM emits a beam of light to a target prism and back to calculate the distance based on the phase shift of the returning beam.
2. Equipment used includes a total station, tripod, and reflector. The procedure involves setting up the total station on point A and placing the reflector on point B to take distance measurements.
3. Multiple readings were taken between two points over 100 meters apart by different people. Taking the sum of readings and dividing by the number of readings yielded a result of 112.4481 meters, demonstrating EDM's high accuracy for distance measurement.
The document summarizes the key components and use of a theodolite surveying instrument. It describes how to set up the theodolite on a tripod over a marked station point on the ground. It explains how to level the theodolite and take angular measurements to determine angles and positions between station points using the horizontal and vertical axis. The document also lists the main parts of a theodolite and their functions.
This document is a report on a fieldwork traversing exercise conducted by students. It includes an introduction to open and closed traverses, as well as northings, azimuths, and bearings. The objectives of the exercise were to learn traversing procedures, establish ground control, and gain hands-on experience using surveying equipment like theodolites, rods, and bubbles. The document outlines the equipment used and provides field data collected. It discusses computing angular errors, bearings, coordinates, and error of closure to evaluate the accuracy of the work.
The theodolite is a precise instrument used to measure horizontal and vertical angles. It has greater accuracy than a magnetic compass, able to measure angles to within 10-20 seconds. The main components are a horizontal circle to measure horizontal angles, a telescope that can rotate vertically and horizontally, and spirit levels. Measurements involve setting the instrument over points and using the horizontal and vertical circles to measure angles to other points using techniques like repetition or reiteration. The theodolite is used for tasks like traversing, measuring deflection angles, and computing latitude and departure distances.
Any line has a length and direction that can be measured using instruments like a chain, tape, or theodolite. A compass is used to measure direction with reference to magnetic north. There are two main types of compasses: the prismatic compass and the surveyor's compass. A compass contains a magnetic needle that points to magnetic north and allows the user to determine bearings by aligning the needle with an orienting arrow on a rotating housing marked with degrees.
this presentation deals with the introduction of some of the commonly used optical microscopes in forensic labs; compound microscope, stereoscopic microscope, comparison microscope, fluorescence microscope and polarized microscope.
This document discusses various concepts related to compass surveying including:
1) Definitions of true meridian, magnetic meridian, arbitrary meridian and grid meridian.
2) Methods for designating magnetic bearings including whole circle bearing (0-360 degrees) and quadrantal bearing (0-90 degrees in four quadrants).
3) Concepts such as magnetic declination, dip of the magnetic needle, and methods to correct for errors in a compass traverse.
4) Different methods for conducting a compass traverse including chain, compass, theodolite and plane table traversing.
5) Checks that can be performed on closed and open traverses.
Area and Volume Survey Engineering (RZ)Riezat Zainal
This document provides information on calculating areas and volumes for engineering projects. It begins by outlining the general and specific objectives of understanding basic area and volume calculation concepts and methods. It then discusses the importance of area and volume estimation in engineering works like route alignment and construction projects. Different methods for calculating areas are described, including rectilinear areas from chain or traversing surveys using triangles, trapezoidal approximation of irregular areas between survey lines, and using coordinates. Calculating volume is also briefly mentioned. Specific examples are provided to demonstrate calculating areas from field dimensions and coordinates.
A level is an instrument used to determine differences in elevation between points. It consists of a telescope to provide a horizontal line of sight and a level tube to ensure the line of sight is level. Readings from a staff held at points allow the elevation of points to be calculated relative to a known benchmark. Leveling loops are closed to check for errors by comparing the sum of backsight and foresight readings to the expected elevation difference between start and end points.
1. The document provides examples of problems involving bearings observed in closed traverse surveys. It discusses calculating included angles, checking for angular errors, and correcting bearings based on lines assumed to be free from local attraction effects.
2. The first example shows calculations for a traverse with station positions, observed fore and back bearings, differences between bearings, included angles, and corrected bearings and stations free from attraction.
3. Several multi-part problems are presented involving calculating included angles from observed bearings, checking for errors, correcting bearings, and identifying stations free from local attraction for closed traverses. Step-by-step working is demonstrated for one example.
The document discusses precise leveling, including its aims, concepts, history in Malaysia, equipment, and types. Precise leveling is needed to establish accurate height networks and transfer heights precisely for engineering works. It requires specialized optical, motorized, or digital leveling instruments and invar staffs read to millimeters. Malaysia's first vertical datum was established in 1912, and its current tidal network helps define an accurate national geodetic vertical datum.
This document provides instructions for setting up a total station, which is an instrument used by surveyors to collect field data. It describes extending the tripod legs to form a stable base and placing the total station on top, securely attaching it with a screw. The instructions explain leveling the instrument by adjusting each leg individually until a circular bubble is centered, and then fine-tuning with leveling screws to ensure full leveling from multiple angles. Once level, the total station is ready for use in collecting accurate field measurements.
This document discusses various instruments used in surveying operations. It describes tripods, level staffs, total stations, clinometers, compasses, GPS, theodolites, and prisms. Tripods are used to support surveying instruments. Level staffs allow determination of elevation differences. Total stations can read distances electronically. Clinometers measure angles of inclination. Compasses determine directions relative to magnetic poles. GPS uses satellites to calculate positions. Theodolites measure horizontal and vertical angles. Prisms are targets used with total stations.
Theodolite surveying part 1 (I scheme MSBTE)Naufil Sayyad
The document provides information about theodolite surveying. It defines a theodolite as an instrument used to measure horizontal and vertical angles accurately. The main types of theodolites are described based on the type of telescope and reading unit. The key components of a transit theodolite are identified and explained. Methods for measuring horizontal angles using a transit theodolite via the direct and repetition methods are outlined, including how to set up the instrument, take readings, and calculate angles.
The document provides information about the basics of using a theodolite for angle measurements in surveying. It defines key terms like angle, vertex, and degrees. It describes the main components of a theodolite including the telescope, horizontal and vertical axes, plate bubbles, and screws. It explains how to perform temporary adjustments and measure both horizontal and vertical angles using methods like ordinary, repetition, and reiteration. Precise angle measurements are important for surveying applications like setting grades, ranging curves, and tachometric surveys.
This document provides an introduction to theodolite traversing and surveying. It defines a theodolite as a telescopic instrument used to measure horizontal and vertical angles with high precision. It describes the main types of theodolites as transit and non-transit theodolites, as well as vernier and micrometer theodolites. The document also defines various surveying terms related to theodolites and their use such as centering, transiting, face left/right, and line of collimation. Finally, it outlines the basic process for temporarily adjusting a theodolite in the field, including leveling, centering, and focusing the telescope.
The document discusses angle measurement using transits, theodolites, and total stations. It provides definitions of horizontal, vertical, and zenith angles. It describes the basic components and functions of transits and theodolites, including different types like repeating theodolites. The document outlines procedures for measuring horizontal and vertical angles, including methods of repetition and reiteration. It also discusses instrumental errors and how to perform temporary and permanent adjustments of a theodolite.
The document discusses various surveying techniques including trigonometric leveling, tacheometry, aerial photogrammetry, and curve surveying. It provides definitions and procedures for measuring horizontal and vertical angles using a theodolite. It also describes adjusting theodolites, focusing the eyepiece, and leveling the instrument. Tacheometry is introduced as a method to determine horizontal and vertical distances through angular observations. Applications of aerial photography for engineering projects are outlined. Finally, it covers setting out simple and compound curves, as well as transition curves.
this is a surveying practicals work book in which different practicals are described with tables and graphs which are performed during a course of bachelors of civil engineering
The document discusses theodolite surveying and the use of a theodolite to measure horizontal and vertical angles more precisely than a compass. It defines theodolite surveying as surveying that measures angles using a theodolite. It also describes the basic parts and functions of a transit vernier theodolite, how to manipulate it, adjustments that need to be made, and methods for measuring horizontal angles.
Introduction About Theodolite Instrument Theoretical part Bahzad5
Plane and Applied Surveying -2
Theodolite Theoretical part -1
Prepared by
Asst. Prof. Salar K. Hussein
Asst. Lecturer Mr. Kamal Yaseen
Overview
v Introduction About Theodolite Instrument
v Theodolite and its classification
v Parts of Theodolite
v Theodolite Axis and conditions
v Setting up the Theodolite
v Levelling & Centring - the Theodolite
v Readings in the Theodolite
v Theodolite – Instrument Checks
v Sources of errors
Erbil Polytechnic University
Technical Engineering College
Civil Engineering Department
This document provides instructions for experiments in surveying lab II, including measurement of horizontal angles using repetition and reiteration methods, trigonometric leveling to determine heights and distances, tacheometric surveying, curve setting using offset methods, and use of a total station for area determination and remote height measurement. The document includes objectives, equipment used, procedures, formulas and expected record keeping/marking for each experiment.
The document summarizes the key components and operation of a theodolite surveying instrument. It describes the history of the theodolite's development from its early invention in the 18th century to modern digital versions. The main parts of a theodolite including its horizontal and vertical circles are explained. The document also outlines how theodolite measurements are taken and discusses potential sources of error.
The document provides instructions for operating an optical theodolite surveying instrument. It includes:
1) An overview of the instrument's applications in surveying, engineering, and construction projects.
2) Details on centering the instrument over survey points using either a plumb bob or optical plummet.
3) Procedures for leveling the instrument using either a plate level or automatic index to ensure accurate angle measurements.
Unit No 2 Theodolite Surveying and Traversing.pptxADCET, Ashta
1. The document discusses theodolite surveying, which is a method of surveying that uses a theodolite to measure horizontal and vertical angles.
2. A theodolite can be classified based on its horizontal axis as either a transit or non-transit theodolite, and based on how it reads angles as a vernier, micrometer, or electronic digital theodolite.
3. Common steps in using a transit vernier theodolite include setting it up over a station point, leveling it, and measuring horizontal and vertical angles through methods such as general, repetition, and reiteration.
This document provides an overview of theodolites and their use in surveying. It discusses how theodolites are used to measure both horizontal and vertical angles. A theodolite is an instrument designed specifically for angular measurement and is one of the most versatile survey equipment. Modern theodolites can measure angles to within 0.1 seconds of arc. The document describes the basic components of an optical theodolite, including the tribrach, horizontal and vertical circles, telescope, and methods for setting up and using a theodolite to obtain angle measurements.
The document describes a field experiment to measure a base line using manual surveying methods. It provides details on the equipment used, including a theodolite, auto level, thermometer, spring balance, supporting stands, pegs, steel tape, fiber glass tape and leveling staff. It also gives the objectives and relevant theory on base lines and how to measure them accurately using corrections for temperature, pull on the tape, and other factors. The goal is to find the length of the base line with complete accuracy by applying all necessary corrections.
The document discusses the importance and use of the theodolite, an instrument used by surveyors to measure angles and distances, describing its setup process which involves placing it on a tripod over a marked point, leveling it, and turning it on to take angular measurements at stations by rotating its horizontal and vertical axes. It also lists the key parts of the theodolite and provides an example of how it is used to determine horizontal angles between stations in a survey.
Mass diagram and its characeristics .pptNITINSURESH30
The document discusses the use of a theodolite for surveying. It describes the main parts of a theodolite including the levelling head, horizontal and vertical circles, telescope, plate levels, and clamps. It also defines important terms used when manipulating a transit vernier theodolite such as centering, transiting, swinging the telescope, and changing face. The theodolite is used to measure horizontal and vertical angles which is important for tasks like setting out grades, locating points, and tacheometric surveying.
Abstract— This research paper with how to facilitate and manage surveying instrument theodolite and total satiation and take more accuracy for civil works methods to accomplish modernized and cost effective urban survey with best achievable accuracy. This is done by surveying methods with modern methods from both theoretical and practical point of view. At first, a theoretical assessment process on a tradition urban planning project in India is performed by replacing other instrument of surveying techniques previously used with more applicable surveying techniques as theodolite and total stations, regarding different matters such as applicability, cost and accuracy. After approving the main idea of this modernization process, a practical urban planning case study is performed using total station, geodetic GPS receivers and GPS navigators, on a private sectors The applied surveying techniques showed high efficiency regarding cost and effort, while saving observation time reaching to 80%. Accordingly, the adopted practical application proved to be beneficial for all civil sites.
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Impartiality as per ISO /IEC 17025:2017 StandardMuhammadJazib15
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2. INTRODUCTION
Theodolite is used to measure the horizontal and
vertical angles.
Theodolite is more precise than magnetic compass.
Magnetic compass measures the angle up to as
accuracy of 30’. However a vernier theodolite
measures the angles up to and accuracy of 10’’, 20”.
There are variety of theodolite vernier, optic,
electronic etc.
4. VERNIER THEODOLITE
Vernier theodolite is
also known and
transit.
A transit theodolite is
one in which the
telescope can be
rotated in a vertical
plane.
Alidade assembly
Horizontal circle
assembly
Levelling head assembly
Line of Sight
Traverse/horizontal axis
Vertical circle rigidly fixed to
the telescope
Vertical axis
Three assemblies of Theodolite
5. Main parts of a theodolite
Levelling head (7): Levelling
head is used to attach the
instrument to tripod and attach
the plumb bob along the vertical
axis of the instrument.
6. MAIN PARTS-2
Lower plate/circle plate (18): an annular
horizontal plate with the graduations
provided all around, from 0 to 360°, in a
clockwise direction. The graduations are in
degree divided in to 3 parts so that each
division equals to 20 min.
Horizontal angles are measured with this
plate.
The size of the theodolite is defined by the
diameter of horizontal circle.
Upper plate (17): Horizontal plate of
smaller diameter provided with two verniers.
on diametrically opposite parts of its
circumference. These verniers are designated
as A and B. They are used to read fractions
of the horizontal circle plate graduations.
The verniers are graduated in 20 min and
each minute is divided in 3 to 5 parts making
least count 20” or 10”.
7. MAIN PARTS-3
Clamps and tangent screws (15, 19):
There are two clamps and associated
tangent screws with the plate. These screws
facilitate the motion of the instruments in
horizontal plane.
Lower clamp screw locks or releases the
lower plate. When this screw is unlocked
both upper and lower plates move together.
The associated lower tangent screw allows
small motion of the plate in locked position.
The upper clamp screw locks or releases the
upper vernier plate. When this clamp is
released the lower plate does not move but
the upper vernier plate moves with the
instrument. This causes the change in the
reading. The upper tangent screw allows
the fine adjustment.
8. MAIN PARTS-4
Plate level (5):
Spirit level with the bubble and
graduation on glass cover.
A single level or two levels fixed in
perpendicular direction may be
provided.
The spirit level can be adjusted with
the foot screw (21) of the levelling
head (7).
Telescope (10): The essential parts of the
telescopes are eye-piece, diaphragm with
cross hairs, object lens and arrangements
to focus the telescope.
9. MAIN PARTS-5
Vertical circle (1): circular plate
supported on horizontal axis of the
instrument between the A-frames.
Vertical circle has graduation 0-90 in
four quadrants. Vertical circle moves
with the telescope when it is rotated
in the vertical plane.
Vertical circle clamp and tangent
screw (11): Clamping the vertical
circle restrict the movement of
telescope in vertical plane.
Altitude level (2): A highly sensitive
bubble is used for levelling
particularly when taking the vertical
angle observations.
12. Important Definition
Changing face
Revolving the telescope by 180° in vertical plane
about horizontal axis
Again revolving the telescope in horizontal plane
about vertical axis.
13. Adjustment of the theodolite
Temporary Adjustment
Setting up the theodolite
14.
15.
16.
17. Measurement of horizontal angle
Measurement of Angle ABC
The instrument is set over B.
The lower clamp is kept fixed and upper clamp is
loosened.
Turn the telescope clockwise set vernier A to 0° and
vernier B to approximately 180°.
Upper clamp is tightened and using the upper tangent
screw the vernier A and B are exactly set to 0° and
180°.
Upper clamp is tightly fixed, lower one is loosened and
telescope is directed towards A and bisect the ranging
rod at A.
Tightened the lower clamp and turn the lower tangent
screw to perfectly bisect ranging rod at A.
Loose the upper clamp and turn the telescope clockwise
to bisect the ranging rod at C tightened the upper clamp
and do the fine adjustment with upper tangent screw.
The reading on vernier A and B are noted. Vernier A
gives the angle directly and vernier B gives the reading
by subtracting the initial reading (180°) from final
18. Read these two method
Repetition method
Reiteration method
22. Read assignment (N. N. Basak, S. K. Duggal)
Ranging and extending a line
Method of traversing
Included angle method
Deflection angle method
Fast angle (or magnetic bearing method)
23. Computation of latitude and departure
Latitude of a line is the distances measured
parallel to the north south of the North-South
direction
Departure of the line is the distance measured
parallel to the east-west direction
25. PROBLEM-1
While making survey through the woods, a surveyor with the hand
compass started from point A and walked a thousand steps in the direction
S67⁰W and reached a point B. then he changed his direction and walked
512 steps in the direction N10 E and reached a point C then again he⁰
changed his direction and walked 15 04 steps in the direction S65 E and⁰
reached a point D as shown in Figure Now the surveyor wants to return to
the starting point A. In which direction should he move and how many
steps should he take.
26.
27. Sources of errors in theodolite
Instrumental errors
Non adjustment of plate bubble
Line of collimation not being perpendicular to
horizontal axis
Horizontal axis not being perpendicular to vertical
axis
Line of collimation not being parallel to axis of
telescope
Eccentricity of inner and outer axes
Graduation not being uniform
Verniers being eccentric
28. . Personal errors
Natural errors
High temperature causes error due to irregular refraction.
High winds cause vibration in the instrument, and this may
lead to wrong readings on verniers
Closing error
29. Balancing of traverse
Bowditch’s rule:
Total error is distributed in proportion to the lengths of the
traverse legs.
31. PROBLEM
Calculate the latitudes, departures and closing
error for the following traverse conducted at
allahabad. Adjust also the traverse using
Bowditch’s rule.
Line Length WCB
AB 89.31 45⁰ 10’
BC 219.76 72⁰ 05’
CD 151.18 161⁰ 52’
DE 159.10 228⁰ 43’
EA 232.26 300⁰ 42’
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