Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 75 views

    FC 1120-Land Surveying I: Traverse

    Uploaded by

    dharul khair
    The document discusses different types of traverses in land surveying. A traverse is a series of connected straight lines between points on the ground called stations. A closed traverse either returns to the starting point or closes on a known point, while an open traverse does not return or close, making its accuracy unable to be checked. Traverses can be classified based on the instrument used such as plane table, compass, theodolite, or EDM. The document also discusses meridians, bearings, magnetic declination, and directions in compass surveying.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd

    FC 1120-Land Surveying I: Traverse

    Uploaded by

    dharul khair
    75 views3 pages
    The document discusses different types of traverses in land surveying. A traverse is a series of connected straight lines between points on the ground called stations. A closed traverse either returns to the starting point or closes on a known point, while an open traverse does not return or close, making its accuracy unable to be checked. Traverses can be classified based on the instrument used such as plane table, compass, theodolite, or EDM. The document also discusses meridians, bearings, magnetic declination, and directions in compass surveying.

    Original Description:

    Surveying

    Original Title

    14 Compass Survay-1

    Copyright

    © © All Rights Reserved

    Available Formats

    PPTX, PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    The document discusses different types of traverses in land surveying. A traverse is a series of connected straight lines between points on the ground called stations. A closed traverse either returns to the starting point or closes on a known point, while an open traverse does not return or close, making its accuracy unable to be checked. Traverses can be classified based on the instrument used such as plane table, compass, theodolite, or EDM. The document also discusses meridians, bearings, magnetic declination, and directions in compass surveying.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    75 views3 pages

    FC 1120-Land Surveying I: Traverse

    Uploaded by

    dharul khair
    The document discusses different types of traverses in land surveying. A traverse is a series of connected straight lines between points on the ground called stations. A closed traverse either returns to the starting point or closes on a known point, while an open traverse does not return or close, making its accuracy unable to be checked. Traverses can be classified based on the instrument used such as plane table, compass, theodolite, or EDM. The document also discusses meridians, bearings, magnetic declination, and directions in compass surveying.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 3

    05/06/2014

    Traversing
    FC 1120-LAND SURVEYING I
     Traverse
    Year I Semester I A series of connected straight each joining two
    points on the ground is called a traverse.

    Topic:-Compass Survey End points are known as traverse stations, and


    straight lines between two consecutive stations , are
    called traverse legs.

    Traverse may be either a Closed Traverse or an Open


    Traverse.

    Closed Traverse Closed Circuit Traverse

     Closed Traverse
    The lines either return to the starting point or close on a
    point of known position. Known
    Point
     If it returns to the starting point, the traverse is called a
    closed circuit traverse.
     When closing to a different point of known Position, it
    is called a closed connecting traverse

    Closed connecting traverse


    Open Traverse

     Open Traverse
    Known Point
    The traverse which neither returns to its stating station
    Known
    SET ON
    nor closes on any other known station, is called an open
    Point
    traverse.

    CHECKED ON
    *** The accuracy of
    angular and linear
    measurements cannot be
    Known
    Known Point
    Known Point Point checked.

    As Surveyors, Do Not Use Open Traverse for Surveys …!!!

    1
    05/06/2014

    Classification of traverse based on instrument used Meridians and Bearings

     Meridians
     Plane table traversing The fixed direction (pole to pole) on the surface of
     Compass traversing the earth is called a meridians.
     Theodolite traversing
     Bearing
     Tacheometric traversing
     EDM Traversing The horizontal angle between the reference meridian
    and the survey line measured in clockwise direction
    is called bearing.

     True Meridian
     The line passing through the North pole ,South pole and any  Grid Meridian
    point on the surface of the earth is known as “ True  An arbitrary meridian (one adopted for a particular project) -
    Meridians” . a mathematically determined value. All are parallel to each
     The angle between the true meridian and a line is known as other
    ‘True bearing ’  Any Arbitrary Meridian
     Magnetic Meridian  Any convenient direction
     The Direction indicated by a suspended needle, which is free
    to rotate in a horizontal plane and about a vertical axis is
    called ‘ magnetic meridians’
     The angle between the magnetic meridian and a line is known
    as ‘ magnetic bearing ’

    Directions

     Magnetic Declination
    True & Magnetic Meridian
     The Earth acts like a great spherical magnet, in that it is
    surrounded by a magnetic field. TN GN
    MN
     This means that the north and south geographic poles and the
    north and south magnetic poles are not located in the same
    place.
     The angle between magnetic north and the true north direction Grid Convergence 1´
    TM Projection
    is called magnetic declination.
    Magnetic Declination Sri Lanka

    2
    05/06/2014

    Next Lecture

    Compass Survey cont…

    You might also like