R.T.U / G.I.T JAIPUR                           SUBJECT –Surveying (3CE4-05)            CIVIL ENGG./ III SEM
                                                 UNIT –4 
               TACHEOMETRY AND PHOTOGRAMMETRY 
                                             SURVEYING
     1                                                                                      PRATEEK SHARMA
   R.T.U / G.I.T JAIPUR                              SUBJECT –Surveying (3CE4-05)         CIVIL ENGG./ III SEM
       Blown up Detail
       1.1 Introduction 
       1.2 Instrument used
       1.3 Classification of Tacheometry
       1.3.1 Stadia Tacheometry 
       1.3.2 Tangential Tacheometry 
       1.4 Introduction of Photogrammetry Surveying 
       1.5  Application of Photogrammetry
       1.6 Advantage & Disadvantage
       1.7 Principle of Photogrammetry 
       1.8 Types of Photogrammetry 
       1.9 Aerial Photographs 
       1.10 Relief Displacements 
       1.11 Tilt Displacements 
       1.12 Flight Planning 
     2                                                                                      PRATEEK SHARMA
  R.T.U / G.I.T JAIPUR                                   Surveying  (3CE4-05)             CIVIL ENGG./ III  SEM
                                         1.1 Introduction 
     •    Tacheometry is the branch of survey in which the horizontal and vertical distances of
          points are obtained by instrumental observations such as staff intercepts and angles.
           – Theprocessofmeasuring horizontaldistance is eliminated
           – Less accurate, but more rapid
           – Bestuseful in case of rough & difficult terrain
           – Primaryobjective is preparation of contour maps or plans
           – UsedinHydrographic surveys, location surveys etc.
     3                                                                                      PRATEEK SHARMA
  R.T.U / G.I.T JAIPUR                                   Surveying  (3CE4-05)             CIVIL ENGG./ III  SEM
                               1.2  Instruments used in Tacheometry are:
          Tacheometer –A transit Theodolite fitted with a stadia diaphragm
          Diaphragm is the frame upon which is mounted the crosshairs to give a definite line
          of sight.
          Stadia hairs / Stadia Lines are a pair of horizontal hairs provided in addition to the
          regular crosshairs. Each on of this is equidistant from the central                horizontal hair.
          CommonlyusedStadiadiaphragms are shown here.
     4                                                                                      PRATEEK SHARMA