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picture1_Horizontal Distance Measurement In Surveying 175947 | Chapter 2 Part 1


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File: Horizontal Distance Measurement In Surveying 175947 | Chapter 2 Part 1
engineering survey 2 tachymetry prepared by pn raihana bt abdul malek introduction tachymetry word is derived from the greek takhus metron meaning swift measurement it is a branch of surveying ...

icon picture PDF Filetype PDF | Posted on 28 Jan 2023 | 2 years ago
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   ENGINEERING SURVEY 
      2 - TACHYMETRY  
          PREPARED BY : PN RAIHANA BT 
          ABDUL MALEK 
    INTRODUCTION 
   • Tachymetry word is derived from the Greek takhus 
    metron meaning ‘swift  measurement’. 
     
   • It is a branch of surveying where horizontal distance 
    and vertical distance can be obtained through stadia 
    line by using teodolite.  
     
   • The distance between marks (titik) can be obtained 
    without using a tape or chain.  
     
   • It suitable to use in valley, river and area where many 
    obstructed. 
     
     
     
     
     
   Use in Civil Engineering 
    • To measure on the ground details : nature detail (e.g. 
    tree, river,  etc..) or human creation (e.g. building, 
    manhole, culvert, road etc...) 
     
    • To produce topographic maps contain detailed 
    information and contour lines for the purpose of 
    planning a construction project such as roads, 
    buildings and others. 
     
    • To obtain the reduce level (RL) between points on 
    the surface of the earth 
     
   Tachymetry systems 
                 5 systems 
     
    i.  Stadia System - Fixed & Variable angle 
    ii. Tangent System  
    iii.Contact Line System and Substance  
    iv. "Optical Wedge" or "Double Image" Systems 
    v.  EDM System 
      
    Main purpose - to calculate the horizontal and vertical distance      
                                    between two points.  
                                - The formula, calculation and adjustments 
     are  
                                    different for each system. 
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...Engineering survey tachymetry prepared by pn raihana bt abdul malek introduction word is derived from the greek takhus metron meaning swift measurement it a branch of surveying where horizontal distance and vertical can be obtained through stadia line using teodolite between marks titik without tape or chain suitable to use in valley river area many obstructed civil measure on ground details nature detail e g tree etc human creation building manhole culvert road produce topographic maps contain detailed information contour lines for purpose planning construction project such as roads buildings others obtain reduce level rl points surface earth systems i system fixed variable angle ii tangent iii contact substance iv optical wedge double image v edm main calculate two formula calculation adjustments are different each...

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